Quote from-snip- was BANNED for Fly Hacking!
I laugh. I've been on this server for about a month, employing all of my hacks the entire time. Only now it was realized that I was doing so, though, and the cause was flying away from the zombie pigmen you spawned on me as punishment for logging out in combat (though what really happened was an OutOfMemoryError since I was on my desktop with only 2GB of RAM and a bad graphics card). Let me list the hack methods I found/wrote myself: flying, super-speed, player locator, x-ray, invisibility+invincibility (what I call "zombie mode"), auto-healing from food in my inventory, client-side WorldEdit commands, super-pickaxe, etc. All that diamond armor and TNT I had wasn't duped. No, it was spawned directly, but don't ask me how. Thank you, and have a nice day.
P.S.: you can get my mod engine from -snip-
Mod edit: User warned for posting hacks.