Is it possible to exchange bitcoins into PayPal credit? I'm aware that PayPal's terms of conditions do not allow for purchase of virtual currencies such as bitcoins, however, is it possible to sell bitcoins and receive PayPal credit in return? MtGox allows you to exchange BTC > USD, but there's no way to withdraw it using Paypal or a similar service.

Is there an exchange that supports either MtGox coupons or direct bitcoin transactions to top up a PayPal account, without the use of a credit card or bank transfer? I'm interested in more obfuscated methods/workarounds as well, even with the use of multiple exchanges.
Some people are selling bitcoins and receiving PayPal payment on LocalBitcoins.com:

https://localbitcoins.com/sell-bitcoins-online/paypal/

LocalBitcoins is in-person exchange. The problems with PayPal tend to hit the bitcoin seller; because PayPal transfers are reversible and bitcoin transactions are irreversible you must trust the party to whom you are selling bitcoins. A malicious party can file a PayPal claim and get their fiat currency payment recalled after they receive the bitcoins. This problem is not specific to PayPal, but all credit card backed payment methods (Venmo, Dwolla, etc.)

Some people have found it possible to resolve issues with PayPal payment recall policy.

Also LocalBitcoins has guide how to avoid this kind of fraud. The sellers have 25% - 50% margin when selling on PayPal, so they can cover up possible losses. Also when done successfully one can profit from the risk, as there is high demand buying bitcoins on PayPal.

LocalBitcoins also has an API, so you can at least half automatize the process, but you still need to have enough buyer audience to make sure there is demand for your bitcoins (there is).