Gotta remember man. In high school scenario it 'looks' like everyone knows each other. Not really. In the world we have NO idea what people around us are really capable of, or what they've been learning. That's the biggest reason to avoid fights as much as possible. You are seeing mini-versions of the dark tactics that people grow up and employ when they get more social power. As adults, they'll do it with lies, video tape, papers, scandals and lawyers.
Most you can do is keep yourself clean. Don't listen to people talking shit or misunderstanding your background eh. U gotta keep your own confidence, and remember. Who really knows you?
That's why 'playing the dozens' were invented. There are certain individuals that have authority and good people around them, and they don't get messed with as much. You blow up too easily and its a poker tell to the slimeballs out there.
You gotta think about the aftermath 'How is this going to end for me?' Or who sees my perspective they they're just constantly poking with verbal sticks. Look at Chris Brown. All those reported incidents because the ones around him, see they can push his buttons and make him raise his fists. The real war starts in your mind, and it has to be won there first. Stay cool