a) You have to trust someone that breaks trust of company he works for and likely confidentiality obligations. And for what?
b) How is a company like PayPal going to "accept" business in bitcoin currently? Paypal has to consider the legal ramifications of doing this in every country in the world where it operates, and where the legality of bitcoin is not yet certain.
c) It would be much safer for PayPal to invest money in a company like BitPay to hedge its bets going forward but to separate its current business from a speculative investment in a 'currency' of questionable legality.
d) Do people really believe random rumors posted on internet message boards? Use your head!
http://techcrunch.com/2013/05/16/an-offer-you-cant-refuse-bitcoin-startup-bitpay-raises-2m-led-by-founders-fund-the-vc-run-by-the-paypal-mafia/
:p
Hahaha! This. I can't wrap my head around how PayPal could integrate Bitcoin. I could see them employing a team of DARPA-types to dream up a PayPal controlled cryptocurrency.
Seriously, sounds like a no-brainer to me.
Seems pretty easy to implement honestly