I think I ran into officers doing this on an onramp today in Mississauga. Slowed my car down and then waved me on without even coming to a full stop. They were positioned on the ramp so that they couldn't be seen from the road (Erin Mills Parkway entrance to head East on QEW) but it seemed VERY unsafe to me as people do enter this ramp with speed. Good on them for checking for illegal plate covers. I've been blinded enough by people with those 'clear' yet incredibly reflective plate covers. I just hope they start doing these checks somewhere safer.
