Just last week someone asked on HN "what are the legal consequences of donating to an organization that is branded a "terrorist organization"? Can you be punished retroactively?"
I replied that yes, you can, and you should not expect rationality or good faith from these people, only savagery. I was down-voted into oblivion. This filled me with confidence, so I donated that very day. Later that afternoon, Paypal caved. Evidently I was the last straw. ;)