OKaaay...
Here's something to think about, just for a moment. Pop Quiz hotshot: Lets pretend you signed up to get an account (it's called an account) at Youtube. Or Yahoo. Or Blogger. Or Typekey. Or any other millions of other sites out there.
And then you figure: "Meh, I don't want this sign-in". What do you do? What do you do?
You abandon the account. You log out and never go back. Right?
Or do you email Yahoo and Blogger and Youtube to ask them to "cancel your account"? No you don't.
Yeah we work the same exact way as everybody else. Fancy that.