Better Laws Governing Social Network Sites

I have started this group because we need better security for our social network sites (facebook, twitter etc) because to many times we here about have to change there profiles because of abuse or people making disgusting comments to others for example over the past couple of days Tom Daley had some digusting things said to him on twitter and now Gary Linker's son was tweeted by someone saying he should of died From leukaemia..... this is outragious and people like this should face the full power of the law.