Electric bikes & scooters

Hey folks on these modes of transportation, it'd be wonderful if, when you are on the sidewalk zipping by pedestrians, you'd use a bell or make some noise, maybe yell "on your left". I've had many close calls, if I took just one small step to the side, we'd both be down, with injuries. I appreciate every one wanting to get to their destination in one piece, a lil noise could help. Thank you!