Unfortunately, it’s a thing. I’ve had people try to merge onto the roundabout when I’m in it, and then honk at me when I didn’t let them through. If any of these people ever do hit my car, I am not going to try to correct them ahead of time so that they perjurer themselves to the cop who eventually shows up to take the report.

Which I think speaks to the terrible level of driver training in America. A roundabout is a combination of things that you should already know about as a driver, like how yield signs work, and how to stay in your lane and follow lines on the road. If you can’t put those thoughts together, then I question your ability to drive safely at all.