Hahahaha, my brother in law recently ('bout 2 years ago) bought a really nice 5th wheel, and has been camping with us in it ever since (we have a class A MH).
He tried from day 1, to lay down the law that nobody could use the shower, nor do a #2 in his RV's bathroom. His wife (who is the primary bread-winner in that family and basically makes the payments on it), pretty much told him where he could put that rule (right up the same place where that #2 comes from, hahahahaha!!). Said she would use ALL the RV's facilities for what they were intended for, and he'd just have to get over himself. He didn't like it, but he knew that was a battle he couldn't win, so he got over it, just for her.
Soooo, *SHE* is allowed to use the shower, bathroom in it as she pleases, but nobody else can that stays with them in their RV. Drives his kids and mother in law (when she travels with them) absolutely crazy. :)
But, Don, to answer your question: No, we do not, nor have we ever had such a ridiculous rule with ANY of our RVs over the years. We use all the 'facilities' in our camper for what they were intended for.
JMO and to each their own, but seems like it kinda defeats the purpose of having an RV if you put restrictions like that on how it is to be used.