good point, but on toll plazas mostly are looking for a free ride, a VAN passes through the same lane every 30 sec. Why should be one afraid of a toll plaza guy, secondally I have rarely seen police picket wallas asking for lifts (Not in isb and sorroundings arleast) cause they have their own system of transport. 3rdly One should never stop the car if a police man without an official car or bike tries to stop you at a place where there is no picket at all. It can be anybody in police uniform.
And anybody can get screwed in Pakistan the same way if he gives lift or he doesnt.