oscar,
As far as I can recall, and in some people's eyes I'm only one step from my basket, we used to have an indicator on the pedestal.
This was an aide memoire that the cabin was secure for take-off and secure for landing. The cabin crew would come in and either tell you or move the little "widget" or both.
There may well have been a time when there was no cabin status reporting but sense and reason has prevailed and the shortcomings rectified.
Let's hope the "In Charges" are re-educated ASAP.
MP