Hey man first off I'm really sorry that those idiots are being that way to you. No one deserves to be treated the way you are.

First off if they're making real violent threats to you actually stating they want to physically harm you, I'd say go to the cops and file harassment charges against them. If you report something to the police then it's documented and that goes along way in prosecution. Even if they're not arrested right then it will be documented and they will be notified by police to leave you alone. If they don't, they then will be arrested.
But if people who rat in your neighborhood, are hurt then don't go to the cops.
Now if you choose not to go to the cops; since they're acting like children, I'd say treat them like children. You know that age old advice about just ignoring it and it will go away? That's what I'd suggest and then I'd say kick it up a notch. Firstly, the real reason why they're being this way to you is not because they don't like you; it's because they want to hurt you.
I don't know how you react to them usually but I'd say act like whatever they do, doesn't bother you. If this guys texts you something mean; just text him back "lol". If he texts you back something meaner come back with a "lmao. ur such a loser. this is the best u have to do with ur life? ur pathetic. lmao."
Call them pathetic. Call them losers. Don't overly curse at them; that'll show they got you angry. Act like what they're doing to you is amusing. Laugh at them. If a girl calls you out for "looking like a guy" tell her at least I don't look like a "herpes ridden hooker" or something like that.

Also after a few months I'd stop texting them back. It will show them that they've bored YOU and now YOU'VE moved on.
Just act like you don't care and if they see they can't hurt you; they'll move on to someone else. It might take a few months, it might take a year, but eventually they should give up.
That being said if, those are the kind of people that will esculate their actions to property damage/destruction or even physical harm; I'd say don't do anything that I said and just go to the cops now because after a while they might get bored with the cyber-bullying and start wrecking your stuff and if you go to the cops now; then there's already that record of them on file.
I guess it all depends what kind of place you live in. Since I don't know where you live, I don't know what to tell you about that. If you don't mind me asking, where do you live? If you don't feel comfortable with a city, state thing; could you just say which state. I only ask because I've read some of you posts and never heard of people being so downright mean and violent to other people on a daily basis and often have asked myself "God, where does this guy live?

" I also never heard of a state that needed you to change your sex before you change your name.