We have one hoity-toity neighborhood that is notorious for drivers yelling at - and even swerving towards - runners.
What would you do? Looking for anything from pithy responses to feeding them Radiohead.
TIA
PS - aside from the possibility of concrete sidewalks potentially being harder on your body and definitely having more tripping hazards, I think you are much less visible and more likely to be hit by drivers pulling out/in than by running in the roads, especially one with wide boulevards and low traffic, such as the ones in question.