Operation Prevent Road Rage Sticker #1

I live in a place where the traffic sucks. HORRENDOUSLY. One of the things that makes this mild mannered individual start to go ape sh!+ is when I see drivers repeatedly zip out in front of others without any warning. Except here's the thing.. they COULD warn. See, there are these things called indicators. I'm pretty sure all cars have them. You flash them in the direction you want to go so people know where you intend to go. Their use is not only common courtesy, but maybe they could decrease/prevent road rage- oh, and perhaps prevent an accident or two? Operation Prevent Road is in full effect!