Why in the hell would anyone ever want this? This would be the most annoying thing in SA-MP ever. It's a good idea, but it'd just be annoying in SA-MP, sorry.
Chances of your shoeties to get open is 5% of 100% and it checks it every minute, so it's kinda hard rare to your shoeties to get open + you can move without running or jumping with your shoeties open.