[rich! @ etiviti]

Would this hook into the existing BP “Favorites” system?

Not really – since BP Favorites is against the activity stream. At one point I thought about adding in the activity replies/comments on a forum component/type to the related topic but no clean way to pull the info out of the activity table – i’m still looking into it though, would be nice to pull it in

the only hook i can do is on bp_activity_add_user_favorite (and remove), then check the activity component/type for forum, then add it to the bbpress favorites system. – at least in theory.

but to avoid confusion of the two different ‘favorites’ – would rename the internal bbpress favorites to ‘watch topic’ or something like that.