Did you ever cheated in games?

The only multiplayer game I ever cheated in was this small game called Cube 2: Sauerbraten. A quake like shooter with a really dumb name that introduced me to my favorite gamemode of all time - instagib.

I used a triggerbot and made sure to miss a bunch of shots as well so nobody would notice. Even lost a couple close games on purpose. Nobody ever noticed a thing.
When I was playing legitimately and noticed other people cheat, I counter-cheated. The tool I was using included a command to instantly kill any player, regardless of where they were. So I'd just spam that command over and over when they respawned, until they finally left