How would you know that just by the ring of a bell?
By the time the passenger had confirmed they aren’t trying it on, they’d be half way to the next actual stop.
Didn’t the X92 get axed in Manchester due to over entitled passengers demanding they were let off because they thought they were actually on a 192?
If they come to the front and ask, "don't you stop there" or "sorry, I wanted that stop" etc.
You say 'you'd be half way to the next actual stop' but that somewhat depends on how 'limited stop' it is! Unless you're on a fast road, generally it's no trouble at all to pull in. (Even sometimes not at a stop, like I would do if I've made a mistake and accidentally missed someone's stop.)
I've even on occasion pulled in on a limited stop service to pick someone up from a stop it doesn't serve, if I've seen another bus shut the doors in their face, etc. It's 20 seconds out of my day but does wonders to put a bit of faith back in the service.
Yes, the Manchester X92 (pm) journeys were indeed withdrawn due to disruptive passengers on it, but one of the most intensive bus routes in the country (and probably picking up more than its fare share of troublemakers) is a different kettle of fish to pulling in at a bus stop on your average bus route to let a 12 year old girl off in the dark where she wanted to be.
Don't get me wrong, you can't always help people out if they've made a mistake as sometimes it's just too busy, or otherwise impractical, but if you can help to not ruin someone's journey, then it goes a long way.