That in the US, it is usually legal to make a right turn at a red light. People who drive up to a red light in the middle or toward the right side of the right through lane forget this. When inevitably a car seeking to turn right stops behind them, blocked from progressing to the intersection, they pull up 5 feet while failing to move their car more than 3 inches to the left.

I've been behind drivers who do this at one intersection, recognize that people behind them can't get by, and then stop in the same position at the next intersection to have the scenario repeat itself.

I've also been first at a red light, pulled fully to the left side of the right lane, and had a car drive up behind me a half a car-width further right be surprised when they find out they're blocking right-hand turners. What do you suppose was the thought process when pulling up behind me? "Look at this maniac stopped all the way on the left side of the lane!"