i don't mean to nitpick here but I have heard of cases of identity theft on FB where the authorities haven't done anything to help the victims despite several people reporting it. Perhaps not for lack of trying, but I suppose the policy is "when in doubt, f### it!" I'm sure a few of those victims would be delighted to see FB go down in flames.
The bottomline is, FB, like most of the Intertubes, is unregulated - even if an imposter is eventually stopped, a lot of irrevocable damage can be incurred.
This cat and mouse game, IMHO, is unavoidable. Even necessary for future security. I'm just glad Anon is keeping itself busy with the likes of FB and (hopefully) not messing with the local nuclear plant.