Please define Trolls, as they pertain to Y! Answers?

Trolls, according to the standard web definition, are people who come on discussion sites, forums, etc. for the sole purpose of posting inflammatory remarks and inciting people into angry statements, just for fun. Here at Y!A, it also includes people who randomly or consistently give people "thumbs-down" for no reason, or report abuse for no real reason, etc.

Trolls in my mind are those that come into Y!A with the sole intent of damaging another's reputation, stalking other's or reporting violations on anyone they dislike. Maybe I am wrong but that is how I view a troll.