People who can’t work out that you are riding 2 abreast on a road because it would be dangerous to squeeze past one of you.
More specifically – cyclists who are also motorists and can’t grasp this concept from either perspective. And then start a thread expressing their dismay.
This thread feels like I’ve stumbled into the BBC’s Grumpy Old Men brainstorming session …
the whole forum exists for that purpose 🙂