In the current version launching smoke grenades from a vehicle creates a big cloud of smoke around your vehicle.
Instead of putting the Strider (or any other vehicle able to use smoke) into such a cloud, smoke should build a broad screen in front of the vehicle, allowing it to relocate or withdraw unseen.
RL-videos to show what I mean:
http://www.youtube.com/watch?v=TODr5NKNuCg
http://www.youtube.com/watch?v=CjlJi4l0cBs
http://www.youtube.com/watch?v=f0nPgu_ckDY
That would also mean that vehicles that have the launchers placed on a rotating turret could create a smoke screen at any side of the vehicle.
Edit: Screenshots from ArmA 2 (thats how it should be) & ArmA 3 beta added. {F20343} {F20344}