Exactly! This is why many doctors do not sign off on emotional support animals. There is no requirement for training and as my kid’s doctor said many doctors got sued by people being bitten by such a dog. She even requires the service dog to have been trained and certified by a known company. Sadly many doctors will sign off on anything only to make money. The other of my kid’s doctor has even a poster with prices for each kind of letter and a letter for emotional support animal is $25. So there you go - you pay $25 and can get a dog in a plane for free.