Many times passengers might found themselves in the lavatory, when turbulence happens. During such times, do the handlebars inside the lavatory provide adequate support to the passenger, or does it makes more sense to install some kind of seat belt?
My question comes from the premise, that if a passenger is in the lavatory when sudden turbulence hits, he/she may not have such necessary aids to prevent injuries, which might lead to a claim of negligence against the airline.
I am mostly looking at answers concerning commercial airlines.