[Kar]

Wow, this is inspirational, this is a major annoying thing in sa-mp and I think you've just started the trend to get it fixed. I will let people look into this and we'll see if we can make it fully anti-mass-car-spawn.

Thanks!

Some tips that I didn't see you track:

OnPlayerUpdate (player updating the vehicle?)
What if the player was in the vehicle?
Vehicle angle?
SetVehicleAngularVelocity?
SetVehicleVelocity?

I'm sure theres more