Re: They kinda do and kinda don't
"... or when there's a passing lane. Gits!"
Not in the UK, but New Zealand (Which is almost all single carriageway blacktop with passing lanes)
It happens regularly, but so does this:
Git speeds up at each passing lane to thwart passing. After the 3rd time, a set of flashing blue lights appear in the queue behind and another twat gets told that he has to retake his driving test.
Sensible countries also say that you _must_ pull over at the first opportunity and let traffic pass when you have more than N (usually 5) vehicles behind. Slow drivers are an even bigger hazard than faster ones because they tend to provoke unsafe passing manouvres. Ideally all traffic should be moving at more-or-less the same speed so there's no need to pass.