They won't see shit but your MAC ID for the most part. Most tits have absolutely no idea how to even put a password on their wireless. There's no way they're going to see the sites you browse to. Not in a million years.
Jack off to porn via PS3 connection any time you wish, my man. Even most nerds will not see you connect. They'll have a password on their in the first place. They're not going to monitor the packets sent through your router and try spending months figuring out the websites you've gone to.