I hear a lot of anxiety from other newcomers to social networks. Most of the folks in the film biz I know seem to initially join a network like MyFace for the promotional possibilities and professional networking. Some get seduced by the actual social functions. The anxiety often comes from what will be seen and shared and by whom. Is it good or bad to friend all those who reach out to you even when you don't know them? Will anyone tag you in photos from the past that you would prefer to remain forgotten? That sort of thing.