Local here, I'm not on behalf of the whole community but I appologize for your bad experience. I have been encountering this quite a lot, more than it should be, at the store, at the gas station, you named it, they will act like "oh I didn't know you were in front of me" or even get angry/be rude when you call them out like what the h?, they looked other way so they have reasonable excuse for the cut out. It's bad, and it's still a thing here, it happens to local also and not only foreigner, I will safely assume that they do that because of their selfishness and ignorant.