I am not sure the way to prevent a tragedy is to regulate it - tragedies can happen even when something is government regulated, but sometimes regulation is necessary anyway...

A profession dealing with hazardous and poisonous materials is one that should be regulated, I think. Not just anybody should be allowed to get his hands on poisonous materials and then walk around selling them as if he knows the proper way to handle them, the amounts necessary for extermination under safe conditions, etc.

The field of extermination has not been regulated, despite the fact that it has people running around spraying poisonous materials in people's houses around the country.

If there is one good thing that has come out of the tragedy of the Gross family, in which they lost 2 daughters due to poisoning from an exterminator leaving poisonous materials laying around and had two boys in critical condition in the hospital for too long before miraculously coming out of it, it is that the Knesset committee for legislation just approved a law proposal that will require exterminators to be licensed.

Having licensed exterminators won't prevent every potential tragedy, unfortunately, but it will cut down on the people who do not know what they are doing running around spraying poison in people's houses.

Hopefully the law will pass.