Forums I agree a lot have died off. I think the Facebook groups became more popular as much easier to police. You can't really have a fake ID on there, and if you do you soon get found out! However even the Facebook groups now seem to be dying off. Have heard a lot of people using Twitter (I've not tried that yet) and WhatsApp.
I am actually still an admin on a Facebook group, alongside Moses and Jonthehammer, two ex-BOTB legends, but we have seen a massive drop off in that group and very little posting these days.