True that they have that clause in their contract, not really true that other players can't impact where they go.
Both Chris Paul & Dwight Howard are coming up on their last season of their current contracts. If they say flat out "I will not sign an extension for team X", then no way on earth will that team sign them as merely a one season rental.
They may not have quite the power Dirk/Kobe have, but they still wield a pretty fair amount.
http://with-malice.com/ - The half-crazed ramblings of a Lakers fanatic in Japan