Are you sure about that? I don't think warrants require you to assist the police in their search, you simply can't obstruct them, so they can't charge you with anything.

That you can be forced to produce a known piece of physical evidence is the premise of the very article you quoted, so yes, I am pretty sure.

What's the penalty that goes with such a charge?

IDK, but you can't keep breaking the law, and have penalties stop. So it won't be one-and-done.

Yeah, but in this case you have to weigh it against the penalty for being proven guilty.

Maybe indefinite detention, and a chance at public attention is better than life in prison as a convicted child molester.