...and other sins of the flesh like smoking and drinking. All legal, but possibly immoral depending on your personal beliefs.
I have always maintained that if a resident wants to smoke, drink and/or engage in consentual sex, they should have the freedom to do it. However, if they have given power of attorney to a relative, the relative gets to make these decisions, not the resident.
We can argue back and forth all day about whether the resident is in their right mind or not, whether it could kill them or not and whether it's moral or not. The bottom line is this: if it was you, wouldn't you want the freedom to do what you wanted as long as it wasn't hurting anyone else?