I have seen that in the UK there have been proposed new laws to tackle so called 'online abuse'.
http://www.bbc.com/news/uk-37601431.
I'm thinking specifically about 'anonymous abuse'. Posting hateful remarks and death threats etc, to a specific known person.
I think that opening up a personal twitter page or whatever to anyone in the world to follow and comment on is just asking for trouble. How can anyone expect to receive only 'lovely' comments and expect nasty comments to stay away, when you invite the whole world to comment. That strikes me as being extraordinarily naive.
I think that time and money spend on tracking down people who post abusive comments is a complete waste of time and public money. Rather I think the law want's further powers to 'track' everyone's online activities ostensibly to track 'online abusers' but actually to have further powers to monitor ALL of our online activities, which is an invasion of privacy.
I would suggest anyone who receives abusive comments and are hurt by it, just delete you account, and don't leave yourself open to it anymore. It's not like a twitter page is an essential part of life, or a right.