It does effect the game when they start using scorestreaks. If they just want to get their headshots because they can't get them like a normal person and don't use scorestreaks then it may not effect the game. But when 30 seconds into the game you have warthog then dogs then swarm then back to warthog etc. it effects the game. They should get a ban for cheating when they use scorestreaks.
Am i the only one who feels like boosting isn't cheating.. [...]
But then again... I don't care what those who agree with you might feel.
I think boosters should be reset to level 1 with -999,999,999 XP first offense so it takes them weeks just to get to level 2.