Congratulations and welcome Hubbly after your first post!
Surely, if BA crew are that anxious to avoid adverse publicity for BA, then they will refrain from breaking the regulations while employed by BA? Additionally, if BA crew wish to avoid being reported by Hotel Staff then they might be well advised not to upset them in the first place. In short, BA crew are required (by law in this case) to behave to the same standards as other airlines: A failure to do so may result in sanctions being taken against the crew, just as for other airlines.
The media article referred to concerns a type operated by BA, the national carrier, also the largest UK airline (by far) and includes input from a BA pilot. It doesn't seem that unreasonable to post an image of a BA aircraft, does it?
No fuel, no fire, no witchhunt - just a sad, regrettable and avoidable incident, unfortunately covered by the media.
I'll ask the question again though - why does alcohol vs flying appear to be a predominantly UK problem?