So the RL, who almost never gets asked what are reasons for a person to be kicked, can kick on players on a whim. If a player questions the legitimacy of a kick, the RL can come up with a reason on the fly (who could confirm/deny it was ever in place to begin with?). This reason can be w/e and ends up being abused. "I didn't know that was a reason for a kick." "Well, you never asked. And there's also the rule that states that I can kick anybody for whatever reason whenever I want. Especially if they want/need same items as I do, but nobody asked if that kind of rule existed so I thought you're okay with it. :)"
Reserves, loot bans and kick conditions should be stated on raid rules. How can something be a rule, if it isn't stated anywhere.