Maybe this as a suggestion to a company known for it's compassion and for it's strict duty of care policy.
A simple Notice to Crew.......... "It has come to our attention that a rumour is being spread amongst the Cabin Crew and some members of our FOP personnel concerning ............... We would like to set the record straight.........."
How hard would this be?
It would quash the rumours and stop this man's good name being dragged through the mud.
Seems logical to me.