[Americanwolf]

The cost to employers in liability, the cost to families and to society in general seems substantial.

Your arguments here are valid, the cost could be substantial all they way around. But I question as to where do we draw the line on government being big brother in this case and let personal responsibility take its course. :)

[A CA Guy]

Well if you agree with me that the cost (to others) would be substantial, then there would be no personal responsibility happening, just personal irresponsibility, right?

[A CA Guy]

Then there is the case of how loud they are. That could be noise pollution. If they were on an island by themselves and would be of no harm, that would be OK. When they are among a whole civilization, they may need to use a muzzle so others can enjoy their freedom of peace and quiet.