Agree 100% it is company policy
It is strictly forbidden for any person within the Flight Deck of any ... aircraft to use any
media, video, photographic or audio recording device or similar equipment, unless specifically
authorised by MLO or designate.
However it always amazes me and seems to be a flexible rule if you are going to submit it to CNews or for an aerial view of the latest typhoon that goes into a weekly update. I can't read that caveat in the above policy, but seems to happen with monotonous regularity.
Have no sympathy for an idiot who posts something on social media, but in the disciplinary procedure I know I would ask the question "why the double standard".