I'm sorry you have to put up with crappy people in the older years. However, I am in year 11 and you have to understand that the older years do gradually become more agitated because they are stressed out over a lot of things such as exams and lots of school work, so they can snap over the smallest of things. Actually, I am guilty of it myself too, I have snapped at a few year 7s who walk slowly in the corridor, but hey, maybe that's because I'm used to secondary school life and it annoys me when people just try to disrupt my day and etc. I hope that makes sense? All I'm trying to say is a lot of the time these people don't WANT to be mean to you and you have to understand some of the reasons as to why they may be mean to you. I mean it certainly doesn't excuse their behaviour (seriously... using such profane language too?!), because NO ONE should be nasty to anyone, but at the same time, you should just try to understand anyway.
But ugh, yeah I hate people like that too. I generally hate it when people joke about profane things and use profane language, because it's not necessary! You don't need to swear a billion times just to tell a story or a joke.

I mean that's my opinion anyway, but it is something some people do grow out of anyway. In year 7, everyone tries to seem edgy and cool because they're finally in secondary school (well, the ones with a massive ego anyone, not saying all of them do anyway!), so they try and joke about "rude" or "forbidden" things to seem "cool" to their new friends, but they just seem stupid! D:
Also, don't ever listen to those bullies! You should ALWAYS stay yourself, no matter what. LIKE the things you like, because that's what makes you YOU. And if you do that, people will gradually learn to respect you and you'll seem way cooler than those idiots talking about those ridiculous boybands and what have you.
Anyway, sorry my post ended up turning into an advice post, but I could just empathise with you a little there so I had to reply to that section anyway.
But yes, I have met annoying, rude, disrespectful people in my lifetime, like everyone has. I think the last "disrespectful" encounter I had was when I sent a long message to someone trying to cheer them up after they made lots of sad posts, and I didn't even get so much as a thank you. Just got ignored.

I mean a thank you WOULD have been nice, but... Nope. :c Makes me wonder why I try at times. Would be nice to be acknowledged.