The first problem is probably a connection issue. I noticed this as in pervious COD titles me and my roommate can play the game at once with little issues. Now this one kicks us out unless only one of us plays at a time.
As for UAV, yeah let me tell you all the ways you can stop a UAV: SMAW and AA launcher Blackhat Ghost Counter UAV FMJ guns (Not recommended unless you are far in the back) EMP/Swarm (if you can get these)
And if that's still not enough for you, well look on the upside. Rumors have it that they are going to boost the cost for UAV anyway.
GamerTag: DocterLuigi If you want me as a Xbox friend, let me know your from GAMEFAQs or I will most likely not accept it.