Once you have identified the troll often times you dont want to keep giving into their stupidity. Usually the first person doesnt know they are being trolled. Someone else will say DONT FEED THE TROLL. The person who is being trolled will be surprised they were being trolled in most cases they wont say anything waiting to see if they were in fact being trolled about something. This is very common in games like world of warcraft (trade channel) guild wars 2 and other popular mmo's
Alex (has every mount in the game): omg!!!! which one ??!! i wish i had an epic mount
Mike : yea dude i just got it its the empirical dragon. Only comes in 4 colors its amazing ...
Alex wow that is so cool!!!!! wish i had that dragon err what you call it mount.
Chuck to mike: he's trolling you Mike, DONT FEED THE TROLL
Mike: what? are you serious?
Chuck to Mike: yup he's trolling you stop feeding him
Alex: lol, nom nom nom Trolly want more food...