I see bicycle cops riding on the sidewalk on the wrong side of the road as if they were entirely ignorant of the law around bicycles. If they were chasing suspects or some other urgency I'd let it slide but often they seem to just be out for a spin.

I've had cyclists collide with me as a pedestrian and run right into parked cars because they aren't looking where they are going. Way too many of them think that everybody is responsible for their safety except for them.