You would have to be very clear in your OP that you were doing this method, otherwise you could be accused of self escrow or similar.
I think you misunderstood what they're trying to say: Have two PayPal accounts. Have the buyer or seller send to your throwaway account and then send from throwaway account to your other account. So if PayPal is charged back, PayPal can only put your throwaway account in the negative unless they reverse the funds sent. PayPal would eventually catch on though so can't say if this method would actually work more then once or twice.