For once I agree with the team's decision to overrule the "community."
Joke proposals are a bit like "fun" questions on Stack Overflow. A swarm of initial interest leading to lots of ill-gotten rep and users willing to fight tooth-and-nail to keep it alive because they feel "invested" in it. Eventually, if the topic isn't closed by the moderators or the community itself, it runs out of steam and gets abandoned anyway. The cycle begins anew.
At this point, we really need the moderators to step in, because there aren't enough (any?) Area 51 users with sufficient privileges to do the janitorial work themselves. And many if not most of the members getting close to that level... are the ones creating and participating in the joke proposals. This is not a good situation.
The concept of a Survivalism Q&A site is fine - it's a hobby for many. But if the proposal was actually intended to be a serious one, then the example questions clearly demonstrate the proposal's inability to succeed due to the community's inability to take it seriously. Of the top 5 questions, two are about raptors, one is about zombies, one is nonsense (Earth's magnetic field reversing?) and the last (decontamination of rice and chickens) is a "fun" question at best. A real survivalist Q&A site would be reminiscent of a Scouts meeting, talking about tool-making, hunting, knot-tying, plant identification and so on.
And if the proposal wasn't intended to be serious then it's simply noise for everybody else. It's drawing attention and resources away from the proposals that actually are serious. It's procrastination.
Apocalyptic Defense is the Programmer Cartoon question of Area 51. It's a monument to the early adopters and should be preserved, but at some point we need to draw our line in the sand and repair the broken windows so that Area 51 doesn't completely fill up with junk.