Obviously different exchanges got different rules regarding account verification. For instance Bitstamp wont let you trade at all without submitting lots of docs. On the other hand there are some exchanges like btc-e.com or indacoin.com that let you sell bitcoins and withdraw USD without any verification. Whats your attitude? Are you ready to send you passport copies and utility bills to verify the account? Why?
Hell no I'am not ready to send my real informations to a website , trusted , long existant or not .
It dosen't make sense anyway ... This defeats the whole purpose of using Bitcoin which is staying annonymus and most of people use Bitcoin for that purpose exactly.
It will even make it worst then Paypal since Paypal don't really need those informations unless you get limited (if something suspicious happens)
~ Madness