First off obviously there are Hackers in this and practically any Multiplayer game, and Ghost is not exclusive to the Noob Hacker club. So this discussion isn't about whether there are Hackers, there are and it's a fact, but more on 'How you know for sure someone is hacking, or a good player.'
If I list 'my' interpretation right off then it will only color your opinions verses other opinions and verses some facts. Key word is facts.
I'm a decent FPS gamer and quite frankly I feel like I'm having an 'off day' unless someone throws a hackusation at me every so often...in Ghosts it's about every 2~3 days. It was the same for BO2 and this forum attracts hackusations as the topic of choice along with an assortment of broken attributes of a particular game.
Q - How do you know someone is actually hacking?