I like the adaptive cruise control, because it drives more carefully than me. I have the same experience as you when I use it, regarding other drivers, but then I realize they're going to drive that way whether I'm using it or not. Therefore, I'm of the opinion that human drivers other than myself will cause the same amount of accidents, but I may cause less using while using it, so in the end there will be less accidents caused by human drivers as more people use adaptive cruise.