In message , at 21:02:56 on Sat, 24 Nov
2012, Malcolm Loades remarked:
It may surprise you, but I promise it's true, that once passengers
realise that you will stop by request their requests become ever more
demanding. You drop one passenger and just as you pull away another
request is made for 'the next corner, please' which is less than 100
yards further on! It can become quite ridiculous but you can't then
start inventing rules like stops must be at least 800 yards apart!

You could always stipulate that the stops must be at marked bus stops.
Or if there are only three people on the bus at the time, not be so
pedantic.
--
Roland Perry