One other thing that massively annoys me - one of my email accounts is a gmail account with a fairly generic username, and people are constantly using it to sign up for things - and I'm getting some that have no way to unsubscribe (like BestBuy trying to get me to activate the antivirus subscription I never bought, or asking me to renew - I don't even live in the same country).

So, if you're sending emails, please, please, put a 'I didn't sign up for this account' so I don't have to try and go to the site and reset their passwords and try to get the account deactivated.

Please just have a link to immediately disassociate my email (like Gmail does).