All cars with the s&s technology have a switch to turn it off completely if you so desire.
You have to physically take the car out of gear and into neutral before the engine will cut out.
As soon as you dip the clutch, the car starts up again.
If the morons don't turn it off ..........wot happens ............ 
Well if you opt for it remain 'abled'. the engine will stop every time you come to a halt,put the handbrake on, dip the clutch, and take it out of gear.
Disable it and it will act like any other car, and remain running until you physically turn the ignition off.
I used to drive into London (and out again) every day from Maidenhead...
The damned car would have had to start itself up about 500 times a day...
Surely you'd be changing the battery much more frequently than in a 'normal' car...?
Or have I missed the point...?
I remember this being shown on the telly years ago and thinking at the time that it was all a bit pointless...
I remember someone brought out a different system (Audi?) where the ECU simply shot down a number of cylinders when they were not needed - it was on a big owld V8 lump tho...
