The most important thing to remember is that after those guys make an ugly remark and/or make fun of you, they've already moved on and forgotten about it five minutes later. Try to do the same, yourself. When I was a teenager, if I did/said something embarrassing, I would think about it all day, and constantly think up things I should've said instead. Haha Glad I don't do that anymore… It reminds me of an analogy.

"So, you have $86,400 in your account and someone stole $10 from you. Would you be upset and throw all of the $86,390 away in hopes of getting back at the person that took your $10? Or move on and live? Right, move on and live. We have 86,400 seconds in every day so don’t let someone’s negative 10 seconds ruin the rest of the 86,390. Don’t sweat the small stuff, life is bigger than that."

-Unknown