The one advantage paypal has is the fact that it isolates your site from credit card numbers. If I go to some podunk site to buy something I almost always choos

The one advantage paypal has is the fact that it isolates your site from credit card numbers. If I go to some podunk site to buy something I almost always choose the paypal option even if they have a merchant account set up. Why? Because with paypal I end up authenticated with paypal.com and I know that no important info is passing through to the podunk site's servers. Otherwise I'm entering my credit card number into their site and I have no way of knowing how good or crappy their security is. I'm basically having to trust them not to do something stupid like store it in their DB, or mail it plaintext to their order processing guy, or some other brain dead thing.