I said this many times ... even 95-100% agreement in a short tactical game, when there is a clear move way better than the alternatives, is not an indication of cheating. However, if in a slow, positional game, when there are 7-8 good candidate moves, consistently picking one of the top 3 choices of an engine, well that is dubious.
I never said that everybody with a high rating is cheating. In fact, I am convinced that this is false. Given the fact that one can select his opponents, I do think that a player rated ~2000 ELO can reach to let's say 2400 in online chess here. Maybe more, I don't know and it does not matter.
I also do not think that cheating is rampant here. In my games (probably I have ~1500 games played in live chess), I think I encountered about 10-15 players which I suspected of cheating. The percentage is very low, I would say it's almost INSIGNIFICANT. The rest of my defeats were largely due to my own mistakes. Some of them I made under the pressure of my opponents, while some of them are unbelievable for a person who does not consider himself a beginner...
In the end, I want to say that I do love this site and I care about it. Had I not cared about it, well, I could have left to play somewhere else. I only hope that all this cheating discussion will improve this site. I am sure that the concerns I expressed here are not only mine, these are the concerns of many others. For instance, here is a long-forgotten thread:
http://www.chess.com/forum/view/general/why-me-and-playing-internet-chess-are-finished?page=1
No, it's better to leave the account visible but closed.
Cheating is against the rules, and permitting it while simply hanging a scarlet C is not in the spirit of fair play.