Activision/TrollArch could really care less about banning cheaters and fixing things, especially amongst the zombie community. I've spoken with some a few times over various glitches in some of the Grief maps and they still go unfixed.
I agree the power lies within the community to set the standard of what is acceptable. I give no respect to lagswitchers, no matter how good of a player they can be when they play legit. The fact that they chose to cheat in the first place shows how little they care for others/skill/ or a good game but more about thier K/D or Win/Loss ratio. For example, I play a decent amount of public Cell Block either with my team or just a bud and once we find out someone/what team is a lagswitcher, every time we run into them/their team we refuse to even bother wasting time to give them a good game when they would rather cheat. Whether or not they have changed their ways matters not as they basically become blacklisted for us to even consider fighting.
I feel this is something others should do- alienate these cheaters so when they are ready for some actual competition they will have no one to turn to and then perhaps move onto fresh accounts. To go along with that, I see a bunch of players claim to be "legit" yet are always partied with well known cheaters. To me, you're basically guilty by association. If you don't want to be labeled as a lagswitcher because you personally don't lagswitch, then don't hang out with known lagswitchers lol. Even if the cheater doesn't cheat with you around and you personally don't cheat, you're tainting your own reputation by even being seen with them in my opinion.
As for tournies, I support banning the known cheaters. Besides, if they *really* wanted to play, they could always just register under an ALT account. There would really be no way for you to know otherwise, but at least your tournies would put more players at ease to not see the names of known cheaters even being acknowledged.
Also, neat lil site here. I'm fairly new but hope to try some tournies soon as summer approaches.