Excellent point. I'm currently working through a mountain of email from a hideous sounding site called Meet Me that somebody's subscribed to using my Gmail address. Not only can I not unsubscribe from the site, I can't even report it to them on their "identity theft" page using my address because it detects that it's in use by a supposed existing member and bounces me to a login page. My only strategy now seems to be to wait out the period until the subscription auto-expires because the email address hasn't been confirmed. Meet Me can die in a fire.