Wait, so you gave someone else your paypal credentials when you were trying to buy Bitcoins from them?

No offense, but if you did give away your paypal login and password, you're pretty much asking for trouble. Your paypal account would only have value on Silkroad (or anywhere else) if you had given both your username AND password... And, why in the world would you ever do that? There's zero reason to do so, even if asked. If their concern is whether you have funds, that's solved by you sending first (since you're paying with the reversible form of payment, anyhow).

Sorry, seems fishy. I mean, even if they did what you're accusing them of, there was no reason at all for you to even have put yourself in that position in the first place. Likewise, if you sent money via paypal and he didn't transfer anything of value to you, then just pick up the phone and complain to paypal and thank yourself that you used a reversible form of payment.