Probably the issue is another. As you say, stopping a car is legitimate, stopping a warship, not so much. However, there's no really the equivalent of a car in Freelancer, as even the puniest of ships is armed (not to mention no one fies anything except the top fighters). Finally, Liberty (and not only) is rather know for the...uhm...proportion of capital ships to snubs.
So the way I see it, it's rather legitimate roleplay.
