Ok, so I'm starting up a new forum, and I can foresee a problem with users donating to get rank, scamming other people, and then charging back their donation. I don't mind if users want to use proxies while logged in and browse the forum, but I want them to have to disable proxies prior to donating. The reason for this is because I will be able to fight a chargeback if I have their actual IP, but mainly it would simply deter anyone who is donating simply for the purpose of scamming.
I realize that I would not be successful fighting every chargeback, especially thanks to Paypal's "the buyer is always right" policy, but the purpose of this is more to deter, rather than fight.
This is a PHP board, MyBB to be specific, but it will have a dedicated HTML page used for donations. On this HTML page is where I would need the proxy detection/blocking. There are several MyBB plugins for proxy detection, but either they don't work at all stopping proxies, or they block way too many legit IPs.
Does anyone have any experience with proxy detection? I know very little about javascript, or coding in general, so noob-friendly advice is appreciated. Thanks in advance.