I don't think you guys entirely understand what they were trying to say. They are saying you can block "friends" on social medias so they don't contact you, and even emails have spam filters which you can set, or you can even make a new email account. However, I think personally when you're young, it's almost embarrassing. You usually blame yourself and want the person(s) bullying you to actually like you, so instead of blocking, you just deal with it, hoping you can change it.
I personally think to fix it we really need to make sure children know they can come to adults. That they won't get blamed for these things happening to them. But how can we do that, when we, as adults, can't stop doing it ourselves? We blame rape victims for the clothing they wear, or abused women for not doing whatever it is the abuser wanted, or domestic violence victims for not leaving immediately. How can our children come to us, judgement free, if we can't do that ourselves?