Selling cars with different names does not qualify anyone to be banned on a public platform. I am sure a lot of people here are doing the same over here, on facebook on MSN etc. It is kinna a routine practice everywhere in the world.
I will second bango here on his remarks, I also sell and buy things from PW and that does not qualify me as a dealer. If I am not wrong one of the owners of PW owns a pretty big showroom in DHA Lahore, would he ban himself on PW? I doubt it brother.
This is an open and public platform and I am sure that all the buyers are sane enough to decide what to buy and how to buy. No one stops anyone from checking the cars, documentation and rest of the stuff; so chill out brother and enjoy life.