I just got a scary call from PayPal accusing me of being a pornographer. They were planning to suspend my PayPal account if I didn't remove PayPal from a particular adult website. I started out very confused because I don't have any adult websites. It turns out that a recent PayPal donation for my Video Embed & Thumbnail Generator plugin had originated from what I believe was a click on a Donate link in the WordPress dashboard of an adult website that is using my plugin. The Donate link goes directly to PayPal and shows the adult website as the referrer for the link.
Once I explained the situation and showed him the page in the WordPress plugins database, he was a lot more reasonable, and decided not to suspend my account, but he strongly encouraged me to remove any PayPal links from the plugin itself because if they see more referrers from adult websites I could see some more trouble.
I would like to keep a Donate link in the dashboard because I think users are a lot more likely to click on that than the link in the plugins database or on my own website, but I want to avoid the credit card morality police. What do the rest of you do? Should the donate link be a link to my own site? Or some kind of redirect that removes the referrer?