In most places on the internet, people won't even read your post about stingers properly, their answer will be "1 person shouldn't be able to shoot down a 10 million dollar aircraft". Thing is, though, flares will break the locks of all stingers(no matter how many are firing at you), and when both the gunner and pilot of the chopper have flares/ECM, there is no meaningful window of opportunity between them, and even if you did get lucky and get a hit, vehicle regen will fix them right up.
As a result, and you know, I kind of agree that 1 guy with a stinger shouldn't be able to dominate aircraft, but 4 guys can't really knock down a chopper either. I was basically thinking that DICE should make it so that flares will break a maximum of 3 stinger locks at once(including both fired stingers and locked launchers). That way, if a raping chopper angers a team into respawning as a significant number of stingers(sacrificing AT ability), they won't be useless.
Notice I was talking about choppers. I find that stingers vs jets are quite capable of, maybe not killing them, but causing the jet to fly away for a few seconds since jets only have 1 set of flares.
A large issue I've noticed is the lack of AA vehicles or turrets on most maps, which was great in BC2 when you couldn't take them out w/ the Stinger. I'm not worried about jets as much because they generally don't concentrate on infantry as much as they do objectives and other aircraft.