High prices and high profit margin are not in and of themselves anti-consumer, otherwise every luxury brand would be considered anti-consumer. If people will buy the tickets at the prices marked, why should they lower them? If they push prices high enough that the demand curve starts to dip, they will rationally correct for that.

The only anti-consumer force at play is the monopoly power Live Nation is granted to dictate the price of tickets. There's very little that can be done via boycott when it comes to monopolies.