Hello. This is attorney Lee Kyung-jun of Cheongchul Law Firm.

We regularly advise clients who have been reported for criminal insult after posting a single line of comment on an online forum or community. Once the other party screenshots the comment and files a complaint, a police summons follows quickly, and most people resign themselves: "I did swear, so I suppose I will be punished."

The Supreme Court takes a different view. Decision 2026Do3934, handed down on 16 July 2026, quashed and remanded a conviction concerning a comment on an online forum. The ruling restates how far the offence of insult extends.

1. The facts — a comment calling someone "trash"

The defendant commented on a post about the complainant on an online forum board. The comments were brief: "h seems like trash…" and "h is trash." The complainant filed a report and the prosecution charged criminal insult.

The lower court convicted, finding the comments insulting because the expressions themselves were contemptuous. Intuitively, unpleasant words look like grounds for conviction.

The Supreme Court quashed that decision. Its core reasoning was that an expression must not be assessed in isolation; the whole context in which it arose must be examined.

Criminal insult is an offence prosecuted only upon complaint. The complaint must be filed within six months of the day the victim learns the identity of the offender. Once that period passes the case is dismissed regardless of how severe the language was. In online cases, the date of posting and the date the victim became aware of it are frequently in dispute.

2. The protected interest is "social evaluation," not hurt feelings

What the offence protects is not the subjective sense of honour but external reputation — society's evaluation of a person's worth. The test is therefore not "did the complainant feel offended."

The Supreme Court held that whether an expression is capable of injuring external reputation must be judged strictly, considering objective circumstances as a whole: the relationship between the parties, how the expression came about, the manner of expression, and the situation at the time. Its explicit use of the word "strictly" matters.

As a result, the offence is in principle not made out in the following cases: expressions that are merely rude and discourteous enough to displease, and minor abstract expressions or swearing used while conveying a negative or critical opinion or emotion.

3. Punishment as a last resort

The ruling goes a step further. Expressions venting dissatisfaction or anger, and habitual, isolated, spontaneous or impulsive swearing, may amount to a civil tort but should not readily be treated as giving rise to criminal liability.

A transient outburst of emotion falls, in no small part, within the domain that can be left to society's own evaluation and control functions or regulated through civil liability. Invoking the State's power to punish — a last and supplementary means of regulation — calls for caution.

The court also drew a clear line. Aggressive, hostile or contemptuous expressions grounded in discrimination or hatred on the basis of sex, race, ethnicity, disability, region of origin or sexual orientation do not enjoy the protection of this reasoning. Such expressions continue to be treated severely.

4. Applying the test to this case

The Supreme Court examined together the character of the online forum, the content of the post, how the comment came to be written, and the overall context and manner of expression of the post and comments. The comment emerged from a flow of exchanges in which members were voicing various opinions about a conflict between particular individuals.

Viewed in that context, the comment amounted to an isolated abusive expression revealing personal negative feeling toward those involved. It might wound the complainant's subjective feelings, but it was difficult to regard it as an insult capable of lowering social evaluation.

The lower court's judgment was accordingly quashed and remanded — a demonstration that identical words can yield different outcomes depending on where and within what flow they appeared.

5. Which comments are still punished

It would be dangerous to read this ruling as meaning "online abuse is no longer punishable." What the Supreme Court found not criminal was an isolated expression arising within a flow of exchanges. Where the circumstances are the opposite, so is the conclusion.

Convictions still follow where the defendant posted repeatedly against the same target, where the defendant disparaged the victim concretely by adding factual assertions, or where the defendant vilified an identifiable person by real name, occupation or affiliation on a public board seen by many.

The same applies to the discriminatory and hateful expressions noted above. Expressions targeting sex, origin or disability are assessed severely even on a single occasion. The ruling does not abolish the scope of punishment; it prevents its indiscriminate expansion.

6. What actually has to be argued in an online insult case

(1) The character of the board and its user base; (2) the flow of posts and comments preceding the comment at issue; (3) the immediate trigger for the defendant's expression; (4) whether the expression was repeated and sustained or isolated.

(5) Whether a third party could tell who was being referred to — that is, whether the victim was identified; and (6) that the expression was not grounded in discrimination or hatred. Point (5) in particular has led to acquittals in cases where only a user ID or initials appeared.

Admitting only "yes, I swore" early in the investigation, without explaining context, forfeits the chance to run these arguments. Before giving a statement, organise the entire thread of posts and comments in chronological order.

One further point: a finding of no charge or an acquittal in criminal proceedings does not automatically extinguish civil liability in damages. The Supreme Court itself acknowledged that the conduct may constitute a civil tort. The response strategy must keep both the criminal and civil dimensions in view.

Closing

Decision 2026Do3934 confirms a direction in which not every coarse expression online will be met with criminal punishment, while drawing a firm line at hate speech. Ultimately, cases turn not on the expression itself but on how persuasively the context can be reconstructed.

Having handled many insult and defamation cases as a prosecutor, I know which expressions proceed to indictment and which are filtered out, and what proves decisive in court. If a single comment has left you facing a complaint and unsure what to do, speak to a criminal defence specialist first. Cheongchul Law Firm will review the matter with you.