Indeed there should be proof of safety before implementing such practices on people.  It's unbelievable that even though the proof that amalgams are NOT safe, mercury is still being used on a daily basis--and people are having to pay to get poisoned.  I'm grateful that there are some people awakened to these facts and willing to stand up and make a point about it so those who are more complacent and/or in denial will get a chance to have the question raised.