PayPal does not require you to reveal your name or other information just your email address.
Although you officially can't use it for porn, but if you are lucky nobody will find out.

Even If your data will leak eventually it is not really that big deal, because nobody will notice anyway or associate that leak with you. For example, if I search my full name on internet I find lots of people with the same name. Just do not freak out or start panicking and just deny everything if someone asks.