Suicide Girls (www.suicidegirls.com) has a deceptive business practice of making all accounts auto renew with no way to opt out (without canceling your account). I signed up for $24.00 and was just recently charged $48 on an auto renew 1 year later.
According to the TOS I did agree to the contract but it is at the very least deceptive (and it may be illegal - I am still looking into it.) to charge twice what I was originally paid without notice. And without an option to opt out of their auto billing on their website is blatantly deceptive.