While I agree with your first point, and tried to get groups I was associated with to move for years, nevertheless there are groups there that engaged in community driven research and have important data uploaded there. (This is my main concern, though other groups were focused on different issues - uploaded art, for example.) So I think while we need to educate people about not using centralized providers like Yahoo and Google, right now we need to focus on getting someone at Verizon/Yahoo to respond to this urgent situation.