They get a little better, I think.
Most people are really annoying in high school. You'll discover this later, once you're in college and you go somewhere and there's a bunch of high school kids and you're like "MAN they're annoying, I hope I was never like them."
Disclaimer: The vast majority of you interferencer high school kids certainly don't fall into that category. It's the U2 vibes, I think. They make everyone better.
slight tangent.
The greatest thing about college, in my experience, is that everyone really loosens up. If you trip and fall on the ice, instead of them laughing at you, you get a bunch of people running (well, sliding) over to help you up and ask you if you're okay. People also get over that whole "If you don't wear this you're not cool enough for me to talk to" type thing.
Of course, there's idiots everywhere, and that will never change.