[mrweasel]

Can't they do that anyway? I mean there's more than one John Smith in the world, there's nothing preventing all of them from having an account. What normally prevents impersonation is people checking if you have the same set of friends.

[Yizahi]

You can't complain to Facebook about impostor account if you aren't registered already. And deleting you profile won't delete you shadow profile that FB collects on everyone, so it is kinda pointless action anyway.