[alecbz]

There's no need to tack on "because the wiki is open". That's still just part of a solution seeping into the statement of the problem.

[cxr]

You're not engaging with the premise. There is no problem involving a wiki that is full of junk and that locking it down is a way to solve that. The concern is that it would be filled with junk if flipped from closed to open.