I dunno about BA, but my company contract includes a clause for instant dismissal for 'gross misconduct', which includes anything that can bring the company into disrepute. This most definitely involves doing anything like three-in-a-bed bonkathons with other staff members when ANYONE might find out.
Ask not how I know this...
R
(but then, my company contract explicitly includes 'consuming alcohol while on company business' on the list of things that are officially naughty. And we're journalists...)