Keep in mind all your actions are being observed and collated somewhere. If you don't want hassle with your next police run in, or worse, don't live in the US and don't want "special attention" next time at the border, think twice about donating...
If you want to make a surveillance state less effective, you should generate _more_ noise, not less. When fascism is at risk of taking over, you don't just roll over and take it quietly because you fear they'll annoy you at the border.
As a person who has Nothing to Hide, I encrypt everything, and will gladly donate here. If we get everybody to use encryption, nobody will be suspect for using it. If you donate here, there's less risk that others will get hassled for donating.
At some point, we must take a stand - and that stance must be time, money, voice or vote (and preferably all four). If we continue to take no action, we become part of the problem by our submission and tacit endorsement of the abuse of the legal rights of others.
For me, personally, I think it's time to start standing up.
I don't think anyone here ever takes any pleasure in using PayPal. Especially with the seizures - maybe that's the biggest concern with using their service.
But that doesn't create an alternative. People have wanted one way farther back than the NSA info dump.