There's already a bunch of mods for black ops you just don't see them too often. As soon as black ops 2 comes out I wouldn't expect that game would be as fun for the people who legitimately want to play it. I haven't seen any mw2 hackers yet, but of course
I only just recently started playing it again. The call of duty I had been spending most of my time on was world at war which is even worse.