So true, so often. Unfortunately this bad habit of not turning off the seatbelt indicator has been taken to a new art form by at least one Alitalia crew. When they are doing food service, they make sure that the light is on. They do the same thing to keep the forward bathroom for themselves after they unlock it (which sometimes only happens after the resting crew or the occassional AZ equivalent of a "FAM" gets in there to change into/out of pajamas first).