Everyone's right in their own mind, that should be obvious.
DD makes a quest, people gather to participate. Was this for the good of the community? Himself? Both? The reasoning is completely irrelevant. Even if he only did it for a white ball on his image, who cares? On the side, there was some implemented activity by him, at that particular time. Ok, others (Eon, dst, and whoever else) gave the community months of activity... that doesn't mean that stopping others from attempting to do the same, even if at a lower standard, is in order, whatever their reasoning. I'm fairly certain that this one quest would NOT have given DD kingship over the Labyrinth - it's a minor step, and I'm quite sure Council would know that.
Eon decides to have some fun. That's alright. I was fine after the 3 GoE teleports, but a limit would have been in order. Amber and Legna are old in MD, so it's easy for them to return. Younger players don't have this privilege. I could have asked for help to getting back, but not everyone has that luxury. Some people are simply socially impeded, because that's how they are - they get hurt by this type of action.
I read above that Eon was asked politely to not interfere. Apparently, the social solution had no effect. Actually, DD can't prove he sent the message (because he cancelled it) in the same manner as dst can't prove her claims of DD's motives - which, once again, are irrelevant to the participants - because they're purely speculative.
If you're expecting people to get ready for everything that can be thrown their way, you'll probably be surprised to find out that this is impossible. Sure, there are ways of countering foul play, but ways around are always found. Example: silvertongue Eon; solution: Eon asks someone else to proceed in his stead = we're back to this thread. Now, the teleport to the East could have indeed been countered with a teleport to GoE, but did anyone have the courtesy of checking whether or not anyone was available and able to help out in that way? Would Eon have done it? Again, one can only speculate.
I guess my point is, if you're gonna mess with someone's work, have a limit.