Right turn on red also endangers pedestrians, which makes them less likely to walk in the future, which in turn adds another automobile to the traffic nightmare.  I'm amazed at how hostile many drivers are when they see me in the crosswalk with a walk signal.  It's almost as they see my walking as an insult to their decision to drive.
Nah, you're just in their way.  How dare you delay them for 10 or 20 seconds?
I pciked up two volunteers on Esplanade Aveunue in New Orleans the other night (they got seperated, I have a standing ofer to pick up any volunteers, etc.).

There was a delay in getting both aboard and six cars were stacked up behind.

Both visitors were amazed that there was not one honk from anyone.