People periodically sign up for various sites with my email address, both US and internationally.
Would it cause legal problems if I used the "forgot my password" option to reset the password and log into the account?
I don't want to (not actually evil), but when a site doesn't send a confirmation link to verify the email and contacting customer service doesn't fix the problem, there isn't much else I can do.
I've actually had one site tell me: "we cannot change the email address without authorization from the user". That's one of the cases when I reset the password and just changed the email address to that site's customer service email.