1-This sort of rule exists in most all games of this nature. It's nothing new.
2. All players have the same concerns in those games as well.
The reason is the opportunity presents itself for regular players who are not intentionally doing the above to get punished unnecessarily for an action that might be perceived as this, and/or have other players intentionally misconstrue events to get a rival banned. It's been done, it wouldn't be a first with this type of thing.
Often times, being banned, whether an appeal or support ticket with an explanation would remove the ban or not-is sometimes enough for those players to quit the game altogether.
That I do not believe is good for this game. In a situation where this behavior is suspect, I'd suggest the game mods bypass actual bans until attempts have been made and an investigation of it takes place. There is a time for immediate bans, based on proof. And this sort of action there is no proof outside of certain events occurring, and a judgement being made on whether it is intentional or not.
The attitude and behavior of mods goes a long way in making a player-base feel like this will not be abused and that it will be handled properly at all times.
And to be frank, the trash talking back and forth that's taken place in this thread among game mods, along with Gem baiting Czaz to talk about something that is expressly not allowed (true or not) is not professional behavior and/or a good representation for how mods will act.
I personally have respect for several mods here, but you can only be judged by how you act, and to players who do not know any of the mods, the above behavior doesn't represent itself well in a public forum.
As Abe said, best to remain quiet and thought a fool, than to speak and remove all doubt.