But no one knows that. The point of the account is to have a foundation for trust, so it's easier to build on top of that.
Sure, but it could put a prospective scammer in a good position to dupe somebody who isn't so savvy.
Isn't selling Bitcointalk accounts on the forum against the rules? Prices seem a little too good to be true.
It's allowed, because it easier to keep in mind that an account can be bought then trying to ban them all.