I really only use one site and I suppose you could say I have a large following on there but really they're all my friends and it's just a fraction of the friends I had on Sodahead
Privacy has only been an issue because our messages on our profile pages are NOT Private by default , has left a few members blushing I can tell you but I'm very discreet.
Now I post a standard greeting to every new member that explains how to make their messages PRIVATE.
Saves the blushes.