I'm not saying the tank should "launch a smoke grenade" as a defensive ability. I'm suggesting the M4 unlock an ability at vet1 to fire a white phosphorus shell. When the shell struck a tank it would blind the crew and release acrid smoke that could choke the men inside (sometimes forcing them out). From what I understand it actually became standard practice by veteran US tank crews to fire a white phosphorus shell at tanks in order to flank them. Would be cool if it was implemented.
I didn't mean smoke launchers, I meant a smoke round. You know, a round that it actually fires from the main gun that just blocks line of sight. You can click where you want to fire the round.
And I know what you meant, I just said I'd like smoke rounds.
WP rounds are a good idea too though.