[School of Rational Thought]

These businesses are consciously considering the question, if a shooter starts shooting up the place, do we want any of our patrons to be armed?

By declaring know, they have unreasonably put their patrons in more danger.

[TigersEye]

The basic reasoning behind this legal decision has nothing to do with Gun Free Zones. It's based on liability due to foreknowledge. Signs or no signs it would put all owners of private property in jeopardy.

This is a socialist/communist wet dream.