I want to say it again: at least for small animals that fit under the seat and are in place of the free carry on the pax is entitled to, charge a more reasonable pet travel fee ($25 each way max) and watch most of the fake ESA problems disappear. This does not solve the big animal issue, but it would solve the issue for many, many people. the $150 each way fee is obnoxious and people will continue to find a way around that. It is not right to fake needing an ESA, but I also don't think it's right for the airline to charge insane fees.