For those saying it is 'bad business practice' to oversell flights, do y'all understand that involuntary denied boarding is laid out in the open in the contract of carriage for the passengers? The information is out there.
But that doesn't make it right as far as a customer service practice. Disney says they can deny entry to anyone they want, too. It's on the back of the ticket. Would it be good customer service to randomly start denying people entrance to the park, though? Yes, the information is out there. The fact remains that it's in the Contract of Carriage to cover IROP situations, not as a scheduling or booking practice. At least, it SHOUDLN'T be. Originally, it was there to keep people from sueing the airline if their flight got canceled or an IROP hit. Now, airlines see a way to make more $$$ by double dipping on seats.
As far as itineraires at MSP with a 30 minute connect on Delta, well, who makes those? SWA wouldn't let you books a connection less than 45 minutes. Not sure what Delta's is, but if the airline sets the connection time in the reservation, well, I don't think it's unreasonable for a paying customer to assume it's a reasonable time. It's pretty conspiracy theorist to think this, but it's feasable that the airline could allow those lower times in order to make it so people purposefully misconnect, thus being able to sell a seat in a prime travel time (ie mid-morning early afternoon) twice.
If the margins are as thin as everyone here claims, one involuntarily denied boarding would eat the profits of several flights. Might as well head to Vegas and play blackjack while the airline is gambling. If it's the last flight of the night, even WITH people accepting other compensation, you're talking a few hotel rooms. That can get pretty pricey in places like JFK or LGA.
I just don't see how anyone in a customer service business sees this as good customer service......