bucket and spade
There is no problem except the psychology that the SLF consider the belts a safety issue and if they perceive it is used for other means they stop trusting the system.
It s all about the little boy crying wolf without reason till one day he was chased by the wolf and nobody listened
So why not extinguish the SBO lights, and ask the SLF by intercom to give the crew a few minutes the space to get organized?
Most bar those who urgently need the toilet I am sure will be happy to comply... And so now you've created more room for the staff and still maintained the integrity of the safety system