Originally Posted by
little bunny
Is it common for crews to occupy a lavatory, in this particular case behind 15K on the upper deck, by locking it after each use? It was not out of service or anything. People were using it initially and then crews started locking it after each use. On another leg it was open to passengers... so I guess this is not common.
Crew tidy up after each use

.
Depends on where passengers are from , can be a mess

. Speaking from observations on numerous flights .
SIA service