Stopping all cars is absolutely a different thing. Of course, if it only happens in certain neighbourhoods, one might pause, but here in Toronto, for example, we have drinking-and-driving sweeps where the police set up checkpoints and stop all cars regardless of occupant or car.

That seems reasonable.

Of course, here in Toronto they also like to "card" people in certain neighbourhoods of certain colours, and there is an ongoing set of protests against how they choose to implement this practice.

But I am personally ok with a certain amount of checkpointing.