it's a double-edged sword.
If you teach your kids to stand up for themselves, then they potentially get kicked out of school for doing so. But if you teach them to take it and report it, then they get that mentality and can be seen as tattletales. Part of the reason it has worsened is that kids can't get away from it. When i was a kid, if you were getting picked on, you could usually just avoid them, now with social media, etc. there are whole new avenues for bullying. And unlike when I was a kid and someone called you fat, it was said and then gone. Now, if someone posts about a kid it's there for all to see unless deleted.
There are certainly inarguable results from being bullied, and that is a problem. Not sure what the solution is.