okay, this is a funny story but it might have some use. My cousin was crying about how you have to have a credit card to subscribe to certain adult things on the internet, because his mom watches his credit card statement he can't get a subscription.

He asked me to "hack" the pr0n site and get a username/password for him =)
Needless to say I didn't even visit the website, instead I visited google and simply typed "related:www.thepr0nsite.com" (without quotations) and the first thing I found was this website http://www.bugmenot.com

It is pretty much a self sustaining website in terms that the users are the ones who give the username/passwords to sites. Although it is not mainly used for pr0n, it is used for pesky little websites like newspaper sites that require you to register to view something that shouldn't be restricted in the first place.

So the next time your presented with a login/register screen you can visit this site, type your website that requires you to login in the search, and see if anyone has already registered and you can use their accounts =)

hope this saves some time.