Well... Delete all social media. That’s a good first step. If your friends want to get a hold of you, they can via phone/text.
NO, she shouldn’t have to do that. Social media is part of our lives now and especially to teenagers, she should have the same respect anyone else is given.
Yeah, I never understood cyberbullying. The victim must be an active participant.
Just stay the heck off and the problem goes away.