But if that's the real reason why people advise not to sell bitcoin on paypal then won't that be easy to get around? You can agree with the buyer to sell btc but on paypal make sure the note says you're selling some random item and then you can ship the buyer an empty envelope just to show a tracking number on paypal but the buyer got his btc and you got your $$.
Selling btc in that way is like selling pretty much any other item but people seem to get extra paranoid when it's btc being sold.