Just to quote IJ
"I don't believe there would be an airline in the world where non-crew personnel are allowed up front any more"
Well close but not quite right. Some and I say SOME companies here (mainland Europe – not that funny English speaking island off the west coast) are realists.
A few weeks back my crew and I were positioning on another carrier, happened that I knew the skipper and asked the CSM to pass a note to him before takeoff.
Basically it said, “Sorry I missed your 50th Birthday Party, don’t F??k-up the landing.” A few minutes later I was invited to the cockpit and spent the rest of the flight there.
I did not work for the company or an affiliate, not in uniform, but did have my ID, I even asked if the company allowed it, he showed me the reference in the OM on his tablet!
So some sensibility is returning. However it probably wont happen in Asia or the UK ever again and definately not while the loonies are running the asylium in Oz.