If anyone is willing to create and update a facebook page for TUS, then by all means, I'd say go for it. But like zippeur said, you'd need a serious volunteer, who's willing to put time into it and can keep this up for a while.
I recall somebody made a Worms TV account on youtube and already stopped adding videos after a week. Good idea, but not enough endurance and enthousiasm to keep it running. You need both
There's a reason companies have hired people specifically for these tasks. Takes up a lot of time.
I certainly don't have enough time to do this (nor do I use facebook anymore)