ManuTOO,
I completely disagree with you. I don't change the lag option when I host (have tried it, and I have seen the issues that can happen if it is set incorrectly). Yesterday, I played someone who obviously was hacking with the lag; sometimes, the lag was 0ms, or 4ms, or 8ms, or 200ms, or even 8000ms, all during same match; took forever to get through that match. Of course, opponent did not complain about it, as he was causing the problem and must have assumed that I would retire. I'm sorry, but you are so wrong about this issue, I think. Watch some of the videos posted on YouTube about lagging. One is entitled, Halo The Art of Standbying (it is a very well-made video:
http://www.youtube.com/watch?v=DO6mRjOJ6H8 ). This has nothing to do with my controller (keyboard) or whatever. The .dmo files never playback exactly as the game was played; for example, desync. errors don't display across the screen in the playback of .dmo as they do in the live game [EDIT: I was wrong...at least with one match that I just played; the desync.s do show

], and the slowness that is encountered in the live game isn't apparent in the playback of the .dmo. If I could record the actual video, as Solarisaint does for his videos, without causing lag, I would do this. I think that I will need to connect a camera to another computer to record a match, so that maybe you will believe me. I am in the IT field, but I don't know everything about gaming. However, I know that this issue is the result of cheaters, for the most part. I played a match last night or this morning with Massu, and he seems to be able to cause a desync. error at will, as I served probably 10 times before I changed my serve a bit and was "allowed" to have the serve count without a desync. error. It took a long time to get through that match, as there were errors on so many points, and most of the time, I had won the point or was about to. This happens when playing him all of the time. This may be unrelated to the lag issue, though.
If you are saying that a lag switch, standby button, firewall, or other "hack" can't possibly affect your game, then I think you are mistaken. About the ball going at normal speed toward me but my movement being slow, I will have to look at that more closely the next time that it happens. However, you can see the same effect in videos of other games, where lag cheats were used. The one using the cheat moves at what appears to be super-speed, while the others are much slower. Sometimes, when this is happening, my player's movements are so slow that I may hold down a button for 30 seconds with no response, as I wait for the ball to continue or the action to continue (this happened with the game with ping from 0ms to 8000ms); in that case, the ball wasn't continuing to move (but was frozen the same as my movement). However, the player doing this would make it so that as he served, during the service motion the action was extremely slow, such that it took up to a minute to serve the ball, but he would make the actual ball strike normal speed, so that I had very little reaction time, going from having my player move basically zero with the depressing of a button for 30 seconds to moving normally as the serve is hit (so I had to be very careful). Sure, I can play the .dmo file, but you won't see any of this, as it plays at a different speed (the serve that took 1 minute will play as if it was normal). Do you still want it?