The real problem is there isn't a solution to it.
It's not a lack of empathy, it's not an excess of aggression, and it's certainly not a lack of understanding what they could wind up doing. There will always be at least one twisted little fuck who wants to make others suffer. Now they have access to the internet and can cause problems for everyone. There are some exceptions, people with the slightest redeemable qualities, but not as many as one would hope.
I say this as someone who also went through plenty of bullying and solved the problem with a number of people. Some of them where decent people who hung out with idiots, others I simply found ways to complicate their lives until they didn't have time to harass me. Which I have to say some of these twisted little fucks will make very easy for you, habitual drug use, multiple 'girlfriends', assumptions of invincibility. It's just a matter of finding the holes you can Huck a wrench into and run. The entire 'ruling clique' of my school fell in on itself after enough of them heard what the others said behind their backs. It was fun to watch, resulted in an utterly epic fight by high school standards too.
That all said, nothing anyone ever says to, about or near you is worth killing yourself over. Fucking up your own life I can see killing yourself over, but I wouldn't give these pricks the pleasure. I wish there was some way to point out to these kids how inconsequential anything but what you learn in school is going to be after you graduate. Dealing with pricks is a damn useful skill too.