The excuse used, they won't let people pay money to people who commit illegal acts.
Wikileaks has not been charged, neither has Assange been charged with anything illegal in any jurisdiction.
So PayPal is now making it's own judgements about what we spend our money on and who we give our money to because they have the foresight to know where it will end up going.
Now we know, PayPal has become just another arm of the United States of America(State department), the leader of the free world, who knows how and why we should do things, provided it suits the US of A.
The next thing that will happen is anyone using an ATM machine to transfer money will be photographed in case it goes to Wickileaks. (the most dreaded terrorist organisation of them all)
The US along with many other countries are threatening freedom of speech, why because they have had non-existent security on diplomatic cables, they leak like sieves.