The ones who know they're turning slow but do it anyways because "coming through, I'm important!" Please, go fuck yourself and know nobody cares about you. Either they think they're so important or they're traffic justice warriors, trying to slow people down because they think they're going to fast.
Spotted a nice old Audi A2 (apart from the missing rear mud flap) and had an idiot go around me on the roundabout in the wrong lane. I'm going to Corby, you can see it on the sign. Even if none of that was there the exit is past 12 o'clock as I was always taught that you should be in the right lane for this anyway.
I honked but TeslaCam has no sound, he didn't seem to notice. I had a woman in a BMW try to do this to me one when I was driving Bob, much further around a bigger roundabout.