I have a lot of experience trollin'. This story isn't the average tr00l post on yahoo answer's or on a forum, much more elaborate. But I do enjoy normal trolling, too.
There was once this member of a forum I was a mod on. One of those annoying kids who really shouldn't post and always caused a problem, but it wasn't like he broke the rules or anything. Mainly since our rules were fairly open. He started to talk to me over MSN, and for whatever reason, listened to everything I said like it was fact. So after there was an issue on the board, he decided to leave the forums, for good, apparently. I immediately contacted him explaining I and the other staff took care of the problems, and because of how maturely he handled everything, we wanted to admin him. So I got one of the admins to make a fake admin group, but without powers. And we put him into that group. After a few days he realized he had no powers and that there were two admin groups, and I played it off as a "trail admin" group, with limited powers, just a technicality. But he could post in the Announcement section, and I got him to embarrassingly give a thank you thread.I said that there is a trail admin CP and such, but of course he couldn't find it. Meanwhile, he thought he could overthrow the staff with his new admin powers, and confided with someone else that he had a plan. Eventually he gave up on getting his trail admin CP to work and asked me to help him and give me his password, (because mods have admin cp's...) I didn't even ask for the pass, I just had it in my pm. So away I went and posted a thread saying how he was now the sole admin of the forums, etc etc. By now most people were onto the joke and played along, others were pulled into the troll as well. It was quite hysterical. Of course this kid was terribly mad at me and never wanted to talk to me again. Like a week later he came back to talk, of course. So, logically I told him I was getting a sex change and he helped pick my new girl's name.
He ended up blocking me. So it goes. It was still an epic troll, and I'm surprised how well the teamwork worked.