Originally Posted by
PepeM
When people are walking predictably and there is enough room to pass, I just pass unadvised. I find that in those circumstances ringing a bell or shouting at them is more likely to cause a sudden reaction, which might very well be jumping right on your path. If they are walking erratically (eyes fixed on a phone for example) or there is no room to pass, I slow down, make it clear I am there, and wait until I can pass safely.
I do pretty much the same thing. With no on coming traffic and plenty of room to the left I will pass without saying anything, or without warning. If multiple people are walking abreast I may or may not say something, it depends on how I observe their movements. If it is a much busier area, or people aren't paying attention I will alert them, but I will say "On your left" instead of just left, if I am with someone else I will say something like "Two on your left" to let them know there are multiples.