I gave up long ago on trying to educated drivers that they should go in turn. Now I slow and look at the other drivers. If they make eye contact and appear to be waiting for me or motion me through, I go. No point in dallying.
What happens on occasion and is even more hazardous, drivers on major roads that don't have a stop, yet see me waiting to cross at my stop and come screeching to a halt to allow me to go. I guess they think their treating me like a pedestrian or something?