If you're (already) stopped, I don't have much of a problem with it (just be aware of when the light turns green).

LEO's shouldn't be doing the busy hands/distracted driving thing either. I followed a cruiser for about 3 miles one day that swerved all over the road and onto the shoulder every time he used the remote on his radar to switch from forward facing to rear facing antennas. Worse than your average drunk. I stayed about a quarter mile behind him. Could tell what he was doing by the ramp of my RD