I've had K9 once, EMP once, VTOL and VSAT twice and one time, someone dropped a CP on a roof that was a swarm and as I started to black hat it (as no one else was) the connection was interrupted and the game stopped and booted out to lobby. Seems to me, the commonality of the CP reflects the points needed to attain said scorestreak fairly well.
Good, care packages are in the game to cater to the noob's. You should be happy you got a stealth chopper for 550pts. I hate how a guy can get a few confirms (that aren't even his), a kill, and destroy some equipment, call in a care package and get a VTOL warship or Vsat. Care packages have never made sense to me. All streaks earned from care packages should have half the normal time limit and life than earned score streaks. They should also all be able to get shot down with one missle.
I do not use care packages unless I am playing with people I know.
It sucks that randoms may try and steal it, but such is life. I do not leave my wallet in my car for the same reason: I am not asking to have it stolen, but guess what...
You cannot change other's habits; you can only change your own.
If I ever do forget to change my streaks, I do not even try to re-roll it. It falls, I grab it.. Damn a UAV? oh well... at least I got it!
I always hated it when you got ammo in your care package, I'll get ammo using scavenger. They fixed that in MW3 when they took ammo off. So it's back in Black Ops 2 ey! They better take it off again in MW4 next year. If it is still there well... oh well I'll still be buying CoD the best selling game on the planet.