I often have the same thing happen. A friend actually crashed into someone as they stepped off the bus. My friend was fine but the person getting off the bus lost some teeth. Police determined that it was the fault of the person stepping out for not looking first (not that fault really matters).
I hit my airzound horn a few short bursts as I go by. My hope is that for a brief moment people will stop to wonder what that was and I can go by and nobody is hurt. I don't like the idea of going around to the left.