ok just to ensure everyone knows trolling can be a banning offence i say can be

from urban dictionary
Trolling
The art of deliberately, cleverly, and secretly p1ssing people off, usually via the internet, using dialogue. Trolling does not mean just making rude remarks: Shouting swear words at someone doesn't count as trolling; it's just flaming, and isn't funny. Spam isn't trolling either; it p1sses people off, but it's lame.

The most essential part of trolling is convincing your victim that either a) truly believe in what you are saying, no matter how outrageous, or b) give your victim malicious instructions, under the guise of help.
Trolling requires decieving; any trolling that doesn't involve decieving someone isn't trolling at all; it's just stupid. As such, your victim must not know that you are trolling; if he does, you are an unsuccesful troll.

from wikipedia
In Internet slang, a troll (/troʊl, trɒl/) is a person who starts quarrels or upsets people on the Internet to distract and sow discord by posting inflammatory and digressive,[1] extraneous, or off-topic messages in an online community (such as a newsgroup, forum, chat room, or blog) with the intent of provoking readers into displaying emotional responses[2] and normalizing tangential discussion,[3] whether for the troll's amusement or a specific gain