self centred ignorant people who walk round whilst focussed solely on their phones, not paying any attention to the world around them, and then glare at you because they stumble into your path or similar cos they're not paying any attention to where the fuck they're going or what is around them.
I’m aware I’m one of those walking phone-fiddlers unfortunately. It’s very annoying when others do it and like to think I default to apologetic embarrassment when in the wrong, but it’s a ‘not throwing stones in glass houses’ situation and one that definitely needs working on.