if you need answers you could check bio page of a person who has bn banned for trolling..
you can get a sense of their personality with how they identify themselves likes and dislikes..
i personally get annoyed at them and dont engage them but simply flag them and let mods deal with them. it isnt gratifying seeing as some times mods arent around or they give them too many chances,,
i hope this helps you..
http://www.killermovies.com/forums/member.php?s=&action=getinfo&userid=3424