Lots of times, especially in the drama section, people don't like to admit that they sometimes enjoy making a drama on someone. They think it will give them some kind of positive reputation if the drama goes swell.
In reality it just makes the person they talked about look dumb and the op doesn't change at all. That is, unless it backfires.
Another: A lot of other times it's blatantly obvious if someone is trolling on here and yet, they don't admit it due to that one rule.