Join Date: Jul 2005
Location: Seat 2A
Programs: AA EXP LT GLD 1MM, BA GLD, NH/UA*G, Hyatt GLB, Marr Tit LT PLT, IHG Dia, HH Dia, MGM NOIR, Hertz PC
Posts: 10,595
Compensation is definitely due here no matter if you want to call it an official IDB per legal definition or however else.
The airline screwed up the passengers ticketing, checked them in and then took them off the flight, causing the pax to be delayed for at least one day.
At least $500 per passenger!