An apology is an acknowledgement of wrong and hurt. Causing hurt is not in and of itself a wrong thing; truth, constructive criticism can cause hurt, but that’s not necessarily wrong, it’s a natural response to hearing something that is not liked. Apologies are a benefit of relationship. You don’t owe apologies to people you don’t know and don’t care for. Causing physical pain is always the exception, but the rule remains the same. In short, stop asking strangers to care for your feelings! It’s not their job.