pob that's another disparaging term used by cyclists to differentiate themselves from people who ride cheap bikes
No it isn't, I see the term POB as someone who is ignorant of the rules of cycling (perhaps willfully) and rides around on the pavement, across junctions without looking, knees sticking out and all that bad stuff and probably doesn't even consider themselves as a cyclist rather as someone who uses a bike to get from A to B and doesn't care to take the skill further than that. A cyclist would use the term POB to differentiate themselves from those people, so when someone is talking about 'bloody cyclists on the path' or whatever, they can turn around and say 'they're not a cyclist, they're just a person on a bike'.
I like cars, and I like to think I can actually drive one properly, and take an interest in *how* to drive one properly and how to maintain a car. I used to post in a forum of likeminded people and we'd use the term 'car operator' for those people in cars who only care about getting from A-B and that's it, have very little in the way of proper driving skills beyond that required to pass the driving test (and then some forgotten), driving on the phone, not looking beyond the end of their bonnet or basically doing anything other than focussing on their driving. I'm sure as cyclists you know the type better than most...
It isn't snobbery or anything else. It's a way of distancing onesself in a way that I'm sure you'd be happy to be described differently to someone on a bike riding on the path, seat wound right down, spinning in a bizarre gear while texting your mate.
In the same way as all cheap bikes are not BSO's, not all POB's ride BSO's. There is a guy lives near my lad's scout hut rides a Specialized full sus (stumpjumper? it's all black anyway). He might be an offroad god for all I know but on the road he is definately a POB.