I would add to the op's good comment that we don't need to get picky about "one" reply -- sometimes the first person responding might not have the right perspective, so a second responder might want to chip in. Or even a third. Certainly I don't agree to shut up automatically if I have something worth saying, even if there has been one response already.

A wiki about how to turn away new users. That's special.

Volt, if you read it, you know very well that isn't the motive.

And as a community member, feel free to edit the wiki to correct whatever you find in error.