I've experienced worse "nooby" setups/attachments in previous COD titles but in BO2, it would be the Target Finder.
ANY SMG with rapid fire/laser sight
ANY gun with the target finder (AKA new baby monitor)
ANY player using a riot shield just to grief
smg with 3 attachments
mp7 with stock, quickdraw and fastmag
perks i use are blindeye and lightweight, cold blooded, dexterity and extreme conditioning.
Feel free to use whatever you want.
People cry about the Target Finder but it's great for headglitchers!
It's basically a thermal scope, but nobody complained about them, plus it leaves you with no perephirial vision, which is vital in the fast paced game, so I prefer a normal reflex anyway.
The only nooby thing on this game is when people go on the forums and complain about balanced things. For example, people complain about the Scorpian being overpowered, but that thing has insane recoil at range. The PDW has the slowest kill time out of the SMGs, MSMC is nearly as slow to kill as the PDW but has a small clip. I could go on forever.
Even the weapon balances in the last patch were extremely minor. (Very very very slight recoil increase and decrease on the SMGs and Assault rifles respectively). This proves that every weapon is pretty viable, and although there are a few that stand out in each weapon group, every weapon has a place and is perfectly useable.