cold blood perk = overpowered ?

[darth coppper]

i play hardcore all the time and once cold blood is unlocked 99% of people use this perk , me included , its mw2 equivellent to cod 4 Uav .
so why is it overpowered ? why does it carry so much strength ?
these are my reasons because this perk cancels out so much of the games potential
ok here goes , all in the following list are cancelled out while you use cold blood
UAVS,SENTRY GUNS ,PERDATOR MISSILES ,COPTERS, HARRIERS , GUNNER COPTER , AC 130 , heart beat sensors , thermal scope ? ,
i think that covers it but i know i might have missed a few more possibilities,
so look at all the above 9 extra additions to the new game which have been made useless when you carry cold blood , i mean in cod 4 when you use UAV all that happened was when the enemy put up a uav you were invisible , it worked fine but the copters could still kill you .
but in mw2 you can quite happy go about your buisiness without worry of being shot from above or running into sentrys or comming accross someone with a thermal scope attached. i never attempt to shoot down enemy aircraft whats the point ? not many people do , not nearly half as much as you would playing cod 4 ,
so what im getting at here is cold blood should only cancel out EMEMY UAVS
not air threats or any thing else , i know this would make the game harder but so thats how i feel , thoughts ??
''please ignore the heartbeat sensor part in my thread im wrong cold blood does not cancel it out ''