You don't have to schmooze. You can lurk. I find it a very good way to keep current on things which are important but tangential to what I do IRL. Also, when I have run into a technical question, it is very good for quick info and you can assess the quality of the source by looking at their profile.Thas is so NOT me!
And we all know I am on FB either.
If you do sign up, only take the free version