Hmmm...
After reading that, I have a few things to say.
First, I'd just like to state that I do use the Dojo, and Have found it very usefull, and from my experience I have found that it does work. HOWEVER: I have also not seen very much indication of battle strategy being taught there.
I would also like to say that I was the sort of person who didn't go outside Marind Bell until after exploring everywhere else, simply because of the AP cost to do so (Now I laugh at my behaviour back then, but that's what it's like when your new)
Ok:
1. I agree with the idea of moving the Dojo to the Fenth's Press. It makes sense, because you can have a sparring pit populated by MP2 sitting right outside for rituals, is so close to the GoE, and doesn't prevent you from training if you want to. It would eliminate the need for idling rules, as anyone in the sparring pit should be fair game. In regards to the idea of people waiting there to slaughter anyone who came out, I don't think you would get to many people doing that as people using it would probably have very weak creatures, therefor giving very little EXP.
2. If having an MP2 horde is to unsightly, why not have an NPC that behaves like a character who has no creatures? Able to open the ritual setting window, but gives the response of no defending force, so can't be eliminated from the area. Make it a statue, or something.
3. I had myself removed from Dojo protection, but still spend most of my time there. My aim? I normally have a ritual set that is strong enough to beat most other MP3's, so I deter hit and runners from attacking the dojo. People ARE willing to defend the Dojo, You only need to ask.
4. Rather than spells, whenever I see someone complaining about being attacked in Dojo I tell the victim to leave a note in the players PL, and leave it there until the player demonstrates a changed attitude. Temporary Black Marks can do wonders...
To sumarrise: Idealy, if the system is to broken, move it here and set up a non-combat NPC. You get safety of a sanctuary, ritual setting plus agreed fights, and access to the GoE, where Veterans are often online to offer advice, as well as LHO. This would also mean you wouldn't need as many Dojo staff, just the ones who were doing their job properly.
(Wish I'd been able to go to the debate, but it was at 4am...)