When I registered my account it asked for my email but it didn't say how the email would be used or if it would be shown on the page. Since I didn't want the address picked up by spambots I gave a slighly altered address with "REMOVE" in the middle.
Only _after_ I pressed the button did it tell me that the email address would be used to confirm my new account. Of course the altered email I entered is not usable by a program (that's the whole point of altering it). That's why my login is "nuts". It's what I said when I saw what had happened. Well, actually it's a more polite version of what I said.
It would be really helpful if the "create account" page would tell people how the email is going to be used.