That method only removes the ability to crank it over, it will keep running until it next stops and needs to start again.Just be aware that remotely disabling a vehicle whilst it is being driven is illegal and would invalidate your insurance.
it could but the relay being energised all the time will draw current from the battery.Thanks Loz, I thought your circuit actually chipped into the stop/ start circuit though, or is this the same circuit ? Could yours be activated by sms after locking up ensuring no starter motor until de-activated ? And lastly hopefully Loz, do you fit warning stickers in your windows? Once again.....Thanks