As the inevitable conflicts rage over what the 'true' way of 40K is these days, I would remind TOs of this simple truth. The problem isn't the players who aren't having fun. The problem is the game itself, and how the leaders of the 40K community are responding to its many problems.
Don't evade, deny, and cajole. Step up and unite instead! Form a counsel, decide what's kosher, and get every event out there on the same page. Otherwise your efforts will only further fragment what's left of the community, and keep your potential attendees in their basements.