To whoever it was that said they felt discriminated against ....

In the US, the reason is that most minors can't be legally held responsible for their financial actions. In most places in the US, the financial responsibility kicks in at 16, but in others 18. Since PayPal serves all of those locations, including internationally, they need to abide by whatever rules protect them in the majority of places. It's why most business owners (at least those that know the law) won't allow anyone under 16 to run a cash register ... if money's missing, they can't hold them responsible w/o full proof they stole it. It's also because in the US, no one under 18 can legally enter into any contract agreement (unless this is 16 in some areas too now). Therefore, PayPal can't enforce a contract if they make it with a minor. Of course, if you lied .... Basically, it's based on laws beyond their control, and for their (and everyone's) protection in the long run.