If people are bullying you on any type of social media, you shouldn't put up with it. Real friends don't do that to each other.

You don't have to be tolerant to the bullies.

I blocked few people once... Then, every time when I looked at my block list I saw those people.. And when I didn't look at my block list, I knew they were there :))) So instead of removing them from my life, I had them with me as the result forever!! :) So I unblocked them. 

 I think it is not good to block someone particular my friends so I have ever blocked people without dangerous man like cheat.