When human's go to the doctor, and they RECOMMEND something or RECOMMEND not to do something, usually this advice is followed
So if my vet or another vet would recommend something that is so known about, most people want to follow that advice to prevent something from happening to our precious babies. I dont think any of us here are that "hard headed" about our babys health.
So just tell those at the other forum not to be so hard headed and love their lil' furbabies enough to be safe and not use them.