"So, in such cases, my only option is to request a password reset, login, and either close the account, or change the email address to something else."
Are they able to do that without confirming you are really the person who opened the account? Why not just run the account out of login attempts with a bad password, then the actual owner has to get a reset done without the right email address - if it's important they'll fix it, and they get to jump through all the hoops. That way you are only attempting to access the account, not actually accessing it - which is less likely to end up with you in trouble.
