Ok, excessive swearing,cussing, same thing, (depends to what extent you take them actually) is not really allowed. just dont really go past anything harsh like saying fu*bleep* or sh*bleep* in your stuff. Pretty much like **** (hoping thats aight) would be ok, darn, crap, etc. Pretty much act like your talking to your parents and your brother (say hes like 10). Would you want to swear repeatedly in front of them? (like for real -.-) anyway heres a quick definition on
TROLLING : In Internet slang, a troll is someone who posts controversial, inflammatory, irrelevant, or off-topic messages in an online community, such as an online discussion forum or chat room, with the primary intent of provoking other users into an emotional response[1] or to generally disrupt normal on-topic discussion
Curtesy of Wikipedia.
Also flaming would be pretty much bashing a person, trying to make fun of them and put em down. Like if i say "Omg your such an idiot why dont you just leave this forums your stupid" (was an example dont ban me lol) or something more harsh than that, to someone. It can also be called a Flame War, which would just be people swearing (or not) at eachother in an argument on a forums and stuff.
Hope that clears some of it up for you