> I didn’t realize these simple little things were sore subjects to residents!

Why are you being shady lol? I'm just letting you know that bikers/runners do say on your left. Maybe not the 2 you met over the past 4 days, but they do. It's super weird of you to make absolute statements and then claim it's because they're "sore subjects" when people call you out on your unnecessarily absolute statements. That's all.

Also, your faulty logic is not an excuse to run/bike without saying on your left fyi.