Driving instructors in the UK seem to teach that the car should always be left in neutral and the handbrake applied . . . ask anyone who has taken their test recently. I presume that this avoids therisk of the car moving forwards when the engine is started without checking it is in neutral.
Lots of people therefore think that this is good practice, and also ride the brakes going downhill, rather than changing down and using engine braking, as they are taught that 'Brakes are for slowing, and gears are for going!' Many people think that use of engine braking damages the gearbox!
Another awful habit is that of braking before every gentle bend - the Dutch bring this to an art form! No wonder a lot of people get through a set of discs and pads in a year . . .
I heard of two instructors who took a new MINI out for a test drive at Ocean BMW in Plymouth, parked the car, and went on their way. Later in the day, when the rear brake calipers had cooled down the car (in neutral) rolled across the dealership parking area, over a kerb, down grassy slope, across a pavement, down another kerb, across a busy road, up another kerb, down another grassy bank . . . and stopped a foot away from the wall of a Homebase store!