Well it's not "voluntary" if you're ordered to do it and have no choice about complying (as opposed to complying to avoid an undesired consequence, as with non-magical orders), so it still doesn't work.
Well it's not "voluntary" if you're ordered to do it and have no choice about complying (as opposed to complying to avoid an undesired consequence, as with non-magical orders), so it still doesn't work.