While I think if you make a habit of this it would become a problem for you, there are certain times I've done this (meeting someone on an inbound flight at the airport, having an in-person meeting with a colleague in transit at a connecting point, helping an elderly parent navigate an airport and providing some oasis prior to a flight) and I sleep fine at night. Airlines have collectively chosen mostly to operate without regard to ethics (see United refusing to refund for cancelled flights during an epidemic, American consistently not following the terms of their own program in upgrades, all airlines publishing schedules they have no intent on flying based on their current fleet and obligations and then changing schedules weeks in advance to itineraries less convenient and then refusing to accommodate changes, among others); I submit we owe them no deference.