sparkymarky,
A couple of responses to the points you raise. Are you quoting from experience, or from the news?
harshly treated by both police and airline
The Celtic Supporters club have well-documented the fact that - "....at all times the South Wales Police & CID were professional, courteous, polite and eager to provide help whenever possible."
Many of the fans chose not to take this option and instead chose to book into hotels close to the airport and fly up the next day
The supporters club, and other news sources at the time, say that nearly all fans chose to go by coach, arriving at 06:40am the following morning at Glasgow airport.
they were told they would be delayed again while staff investigated the smoking in the toilets
in fact supporters club say that this incident occurred in flight, so why would there be a "delay"?