The issue is also whether you allow society to dictate what medical procedures are performed on your body.
Lets not forget the fine history of unethical human medical experimentation in the United States. And people think we should just give the government carte blanche to dictate medical procedures?
Unbelievable. Something about history, and being doomed to repeat it...
Nice false dichotomy there.
Nobody is dictating what medical procedures you can perform on your (childrens') bodies. Rather, the law prevents them from performing medical procedures (i.e. uncontrolled exposure to dangerous diseases) on unsuspecting victims (i.e. those who can't get vaccinated) in public schools. If you want to perform such experiments, you will now have to do it in the privacy of your own home on victims (i.e. children of other anti-vaxxers) who have consented in some form (i.e. by being ignorant.)
Somehow I find your willingness to subject innocents to known dangers via your private medical experimentation far more disturbing than a slippery slope argument about the government possibly doing so in the future.