Moral Issues
CK is meant only to enhance team communication. The sound broadcasting it performs is no different than being in the same room with your team or calling them by phone. That may be an advantage, but it's not cheating. This situation is different on a non-team server. CK could be used to surreptitiously facilitate teaming and skew the game's outcome. Still though, I've seen instances where a few clan players will team up in a regular deathmatch and openly "say" their messages. Rocket Arena is another example where CK might be abused by passing enemy locations and health stats to your team. Even though the Rocket Arena authors specifically say that's cheating, people still commonly spoil the showdown of the last two remaining pickup players. Nothing is going to stop a cheater bent on breaking the rules. We at Clan Knitters sincerely hope people use Conference Kill responsibly and only in the manner in which it is intended.