Sammy touched on this earlier, but it bears repeating at this point and maybe sheds a little light on the distinction between "cheating" and "glitching". Cheating - the use of aimbots, wallhacks, etc. - is not allowed. When there is proof that shows that these types of game cheats are being used, the player is permanently banned.
The player being referred to here ended up under the map which is considered glitching. If we took out every map that has a glitch spot, we'd lose a ton of otherwise good maps. Players who glitch are warned that it is not allowed, and if they continue, they will get banned. The ban for this particular player was not for cheating, it was for glitching. We placed the ban to get the player's attention, since no admin was around at the time that this happened. He has been warned, and his temp ban will be lifted. He knows it will result in a permanent ban if it happens again.