Are you saying its okay to put one of the most toxic substances known to mankind in our mouths. Not likely to cause harmful effects? Tell that to the multitude of people that have had that particular toxic waste removed from their mouths and have their symptoms disappear.
Will you have one of your handed down, "scientific" responses for them? BTW, what's your take on flouride? Did "they" teach you what they want you to relay to everyone about flouride?