When will museums learn that art and catering don't necessarily mix well ?

We’ve all heard about accidents or near accidents with works of art that have occurred in museums or art galleries during receptions. It was therefore not a surprise to read in the October 28, 2016 issue of The New York Times (“Venus Loses Thumb in Encounter with Caterer”) of a recent report that a statue in the British Museum which had been damaged by a visitor in 2012 was damaged again in December 2015 by a caterer’s worker setting up for a corporate event . When will museums learn that art and catering don’t necessarily mix well?