Smoke screen used in modern military vehicles is able to cover the vehicles from the ATGM guided by SACLOS, IR, WIRE, every guided thread in this game. Right now if rocket is fired, player have zero chances to hide or mislead the rocket. Smoke gives nothing to titan launchers, no barier, aquire and lock is still possible even after biggest smoke screen.
In real life, if shooter quired target and shooted missle, then tank launched smoke, missle should not seen its target and hit its last known position. {F27775} {F27776}