One time I had a lady vet out and she had this big guy that worked with her, like a bouncer, grab my gelding by the ear when she was going to check his teeth. Keep in mind this was my first horse and he was dead broke and lazy and never gave anyone a lick of trouble.
I told her that isn't necessary and she said "how do you usually restrain him?" And I replied "With a halter."
That still irks me to this day. Why would someone go grab a horse by the ear for no reason when the horse was standing politely?