Twitter yes
linkedin ? But as a group – not cross linked
imagine the questions …. I see you know such & such in Game Studio X can you introduce me? as I want to get a job with them, pitch a game …. etc etc
Facebook ? Again same point
Big reason I like current setup is people can lurk without getting to see your pet photos, business or personal contacts.
Sorry for being so old school but I guess I am not alone in wishing for some privacy (silos for different contacts).
Comments flames welcome.