"Thinking is the hardest work there is, which is probably the reason why so few engage in it." Henry Ford
There is a big difference between an abusive trainer/owner and one that is a bad trainer or poor with customer service. If you witness animal cruelty, abuse, contact athorities ASAP, but make sure you know what is considered cruelty in you state. However if you don't like the trainer for what ever reason it is your option to tell who ever you want, but make sure you aren't expecting to much from the man or the dog. If I am asked about a particular person or product I feel I owe it to the person asking to tell my honest opinion, but will not express it with out being asked.