Having a commercial pickup/dropoff of cars occur where people stop to pick up grandma is certainly something airports can’t allow while at the same time charging the rental car companies big money to operate from the airport.

While very hard to address, it shouldn’t be harder to address than it is to address the problem of unlicensed taxis at airport arrival. And if the example from the article involved the person renting the car having to meet the renter at a McDonalds parking 5km from the airport, it wouldn’t sound as attractive.