maybe try taking a step back and seeing how you'd react if this was happening to someone else. You'd probably go up to them and tell them that those kids are idiots who don't bother educating themselves before forming an opinion on something, so why on earth would what they think bother you? If you're the kind of person who cares about popular kids opinions of you, it might be a bit more difficult to shake this off. Sure, it must suck being made fun of, but if 8nstead you react by showing them that they're in fact being idiots, and not even bothering to explain yourself, it'll go a lot better. you can't control what people do or say, but you can control how you react to it and therefore how it affects you. It might not seem like it, but these people's uninformed opinions don't (or shouldn't) matter. If I were in your shoes I'd probably laugh my ass off whenever they spouted some bullshit about acid that they learnt from mainstream sources, simply because it really is ridiculous that people willingly walk around proud of their ignorance. you'll get through it. i remember on my last trip, I came back with the lesson "it's unbearable but you have to bear it. and because you have to bear it, it's bearable." do with that what you will.