What is needed here is for the individuals concerned to be ejected from the BA Exec club and banned from BA lounges- I am not really sure that there is a realistic prospect of a criminal conviction, but IANAL.
Sadly, it seems more likely that if this event receives the traction and coverage that it is starting to show a hint of, it will provide a very useful cover story for changes to the way in which alcoholic beverages are provided in BA lounges.