When the census takers call you, just remind them that since Roe vs. Wade says that the “right to privacy” ensures that you may kill your unborn child, that same “right to privacy” prevents you from having to disclose how many toilets you have.
I rounded up a bunch of empty kitty-litter buckets in case the storm last weekend took out the water pump and I had to use them as impromptu privies. It never came to that, but they buckets are still in the house and could still be used (and therefore counted) as "toilets" if necessary.