I hope there isn't a voicechat feature. Last thing we need is a bunch of 5 year olds screaming into the mic.
What I think should be added is a way to block people from saving your builds. Now some might blabber: "But it's a sharing game, you handicap!!!".
My response: It quickly escalates into a stealing game. People hosting other people's builds ad their own or posting them into the Gallery. It's happened many times before.