I'll also give the thumbs up to AirZound horns. Just today a woman to my right went straight through a right turn only lane in order to get in front of me. I was through the intersection, had already signaled and was moving right already and she knew that she was in the wrong. I honked at her, she totally flipped out and accelerated hard. She was dead set on not letting me catch her at stop signs cause she blew 4 of them without stopping (I actually slowed and checked for traffic at each one then sprinted hard afterwards). I finally lost her when she was going a direction I wasn't.

I would have loved to get her reason for almost killing my daughter and I by going straight through a marked right turn only lane.