Like others have said, in our previous CoD's we whored out our favourite gun, and no one thought any less of you. It seems the tone has changed somewhat in BO. Tbh, I think most people used the other guns quite a bit in previous CoD's, getting the Red Tiger Camo and such. If you saw someone in MW2 with a Fall Camo, you thought they were a one trick pony, whereas in CoD4, a gold gun meant you were proficient in all guns of that category.
In BO, there is no such thing, and therefore the challenge of using a variety of guns has gone, and only we place that challenge on ourselves. That is what keeps the game interesting for us, mixing it up and trying new things, knowing you've got each other's back if someone's not doing too well.
Kaz, you don't need EZmode, I've seen you put up game winning scores. This may be a rarity, but knowing you can do it without the 'training wheels' is surely a sign that you are an above average player. I don't judge people on their choice of gun or perk alone, but how they combine them and whether they camp or not.
If someone is using ghost and rushing with a shotgun, I am less inclined to rage than if he were camping. If someone is using a famas singlehandedly protecting an objective, I am less inclined to rage than if he were just farming in some obscure corner.
It's the mix of EZmode gun, EZmode perks and pussy tactics that really grinds my gears. People play this game to have fun, but what many of us don't understand is how someone can have fun sitting in a corner and ruining other peoples enjoyment of the game. It's some kind of sadism that the community has developed where, unless they are totally annihilating their foes, it's not fun.
I used to have fun getting a 1.0 k/d. Knowing I wasn't a hindrance to my team used to be enough. Even now, as long as we win I don't care how we did it. But for me to really enjoy a game, we come out on top, clear winners, using ridiculous setups and just having a laugh. If everyone ran ghost/famas, we'd easily come top, but it wouldn't be fun, I can guarantee it.