@oromagiDo you think that an urinal won’t be considered art if it is being used in the bathroom? The thing is: In my opinion, a Urinal is an artwork even if it is to be peed on. An artwork that is usable is better than an artwork that is unusable. So what?
I think placing Duchamp's Fountain in a bathroom is failing to understand the ironic juxtaposition of the installation. It's like saying let's remake Caddyshack but this time set in a bowling alley- you've missed what made the thing famous in the first place.
Could some other urinal installed in a bathroom be art? Sure. I've seen very decorative urinals and urinals painted to look like gaping mouths that were quite disturbing. But putting Duchamp's Fountain in a bathroom is missing the point, killing the joke, and disrespecting the artist's intention.