Re: They have the password.
@D@v3,
They do, but a couple of times i have received emails from services i have never heard of, so i go in, have 'forgotten my password', reset link gets sent to my email, i now own the account.
That's all well and good, but you may also have taken on legal responsibility for the account. That might come along with all sorts of liabilities, which might include (depending on the service provider and what is being provided) debt, criminal prosecution, ownership of some difficult-to-explain-in-front-of-a-judge content, etc. Trying to protest "but that's not my real email address" when, clearly, it is (and Google are also saying it is) sounds like a bad day to me.
On the whole, not a good idea I think.