"Malicious comments" is "악플"(ak-pŭl) in Korean.
The evil pull (Akpul), it is a compound word of "evil (악)" and the sound ‘pul’ of English 'reply'. That of those who comments evilly, "evil comment-er ( 악플러/Akpuler) ". Internet bulletin boards and, suffer from severe slander of the comments that are attached to the bottom of the Web news articles, is even that celebrity decided to because of this big social problem. Also such community called the internet society as "evil community". Enforcement to people performing such illegal activity has been enhanced in recent years.