Flag Duty

The Flag Duty award is one of the first achievements obtainable. To acquire it, flag a comment that is considered offensive or unnecessary. The flag button is next to the voting space.

Only users with age 13+ can earn it.

Also, just because there is a flagging button doesn't mean you can just flag everything including low quality posts and Computer Science programs. But some people take the advantage of flagging and flag their enemies' programs unnecessarily.

<-The flag button Since the January 2014 update, users can't vote down.