Easy solution: sell the tickets at an inflated price normally, then give discounts to people who you think wouldn't buy otherwise. Require these people show the

Easy solution: sell the tickets at an inflated price normally, then give discounts to people who you think wouldn't buy otherwise. Require these people show their ID at check-in. This will cause people to willingly give over their data/identity in order to receive discounts - not realizing that if they acted as a class and bought anonomously they would recieve (on average) lower prices. Of course such class action is impossible because it will always benefit some segment to defect, which will inflate the price for the rest, causing more to defect.