Amy said "we might change it but that's what it is for now". Remember in what Grizzly wrote, "When Fireworks is released, the shell game will move into the diving rooms and shells will only be worth a small amount of credits each."
http://myvmk.com/showthread.php?1639-The-Game-is-back-online-Halloween-News!
Right now there is a LOT of importance in getting into the shell super rooms to make money for halloween stuff. I think the 5 minute afk boot is completely reasonable because it makes sure everyone in the super rooms are active and not taking up space of someone who wants to play.
I also had mentioned to everyone in the chat "It'll probably work better [queues] once there are more instances - queues work best for things like host event rooms and stuff ya know?" I didn't intend to direct that at Amy but she replied with "if we had instances there would be no super rooms".
All in all I hope this is just a temporary thing. Amy did mention, however, "it stops people from staying in their rooms overnight to keep the room on the guest room list" I didn't know this was a problem though... Not many people are even on at night. Any secondly, any room can be accessed by typing in the username. On VMK rooms would close and be inaccessible unless the owner opened it or you used a teleporter connected to it.
I hope the 5 min boot does change in the future though. I like being able to go afk or multitask while sitting in my room. Just because I'm not moving doesn't mean I don't have the top of the screen visible so I can see if anyone pops in to say hi.