I think the blocking anonymous comments is a good idea...that way if people want to continue bullying they wont be able to do it anonymously and will be easier to identify. Is it possible to block certain users from posting on ones blog there? She could then potentially do that.

Though sometimes it sucks but in some cases the best option becomes to leave the site...I've been on a couple sites where its just not worth staying on.

The important thing is she shouldn't be talking to these people...and talking about plans for suicide and that sort of stuff on a public blog site like that is unfortunately likely to only make it worse the people bullying don't care...they aren't going to mellow out because she implies she will kill herself. It is probably in her best interest to avoid getting sucked into talking to these people and trying to reason with them about how bad they are making her feel.

I say she should either block the anons, then block non anon posters who post nasty comments...and if these steps don't work or aren't effective she may be better off leaving the site(if it really is full of trolls and hate)...also perhaps finding a website like this would help her as then she would have a place to talk about the issues she's having and such without facing hate and ridicule for it.