By definition, a forum is a platform used to bring in discussions, sharing ideas, or anything of a certain category, whether offline or online which means privacy/anonymity is just a feature that we took and implemented according to our needs.

Bitcointalk is special and for no reason I love the old school theme than the fancy UI of other forums and also forums that replicated bitcointalk tweaked some feature than has been requested by the community more often but still people here love to hangout and participate in the discussions than anywhere, probably because the active members with actual knowledge is more than anywhere else and we can't deny the participation of signature campaigns too.