Bungie recently publicized a series of emails sent by banned cheaters desperate to get back onto Halo 2's multiplayer servers. Here's a snippet from our personal favorite:
"Please! I'll destroy my mods. i'll snich on some people that r getting away with mods on matchmaking! Just PLEASE appeal my ban. i want to play matchmaking again. i want to be clean for the arrival of Halo 3! c'mon! i didn't know what i was getting into when i got mods from my friend and from [website censored]! you have to believe me!!!"
[Thanks, Sense; via 8-bit Ninja]