Well, that's true of you and I but if you care about other people that don't know any better it could be a real issue. There's millions of FB users that don't understand the implications of all their oversharing and will not be happy when/if it becomes a problem for them. But, I think it's too early to judge anything about Google Fiber yet, at least for me, without having much details.
But the cure is found in faster service: With fast connections you can host your own services.
What we really need is multiple competitors in connections this fast.