SAM vs Helos on hight altitude, bug or mistake ?

[Pepper]

I have to add to swenslim's issue here as I think he is referring to our PBEM games where my Cobras have been decimating his forces , despite his having quite a bit of AA. I have no 'real world' experience in the field, but I do have to say that hand-held SAMs and even AA gun fire has been quite ineffective against COBRAs I basically have free reign so long as I don't go charging in and stay back at high altitudes. Perhaps this is realistic? I don't know. But does anyone else think helis seem to be 'uberweapons'?