I find trolling to be EXTREMELY fun in real life. Once you get past the point of caring what other people think about you, life becomes much easier, and extremely interesting. I find cynicism, sarcasm, and general snark(iness?) to be highly effective tools at blowing people off.
"Cool story Breh/Hansel" < Favorite
"Oh, I'm sorry. I know you are saying something, I can see your lips movingbuticant understand you cuz I don't speak LITTLE BI**H" < Second favorite <3
"God it must suck to be you"
"Have fun with your self centered life, I heard it went real well for the other megalomaniacal zealots.... oh wait" (they usually don't understand this to argue it's meaning - double insult)
Although if I'm busy with something ignoring works fairly well.
AS FOR trying to teach idiots, not your responsibility (entirely). If you have any iota of care for the person you will talk to them privately and explain things rationally. If people in school don't want to learn and DON'T learn basic reasoning skills how are you to teach that to them when their parents and teachers failed?
I refer you to my signature now.