> where do you draw the line?

At the property line.  If it's my tree (on my property) I get to cut it
down.  Legislation to prevent me doing that shouldn't exist.  But, this
does not extend to man-made toxic chemicals (used motor oil) which can seep
out of the area of ownership.

> Does one child with a serious peanut or milk allergy mean that no one
>in his/her school can eat peanut butter or drink milk at that school?

Nope.  Just have to ask for cooperation.  And if you don't get it, you just
have to make other arrangements.

>... do we compensate all victims of
>medical misadventure?

No, just the situations where you can identify the guilty party and harm is
done.  Guilt vs. accident.  Harm vs. risk.


> Emotion will always trump facts, logic,
>arguments and consensus.

Not unless we let it.  This particular issue is a personal battle for those
who choose to engage.  Most people prefer to be ruled by emotion or
hormones (testosterone -> war).