CC, I agree with what you are saying about making the choice to enter anyway. But by disarming people you are putting the responsibility of protection in the hands of the Movie Theater and they failed, making them responsible.
Law Enforcement takes a individual into custody, LE is responsible for that individual. know matter if they beat their own head in to the cage or try to commit suicide in jail. They chose to commit the crime, they were arrested and they chose to commit suicide, this does not exempt the LE officer or Jail staff from having the Dept. sued. You are responsible because you took their protection into your own hands...
If the theater had protected their patrons it would have been fine...
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The theater created this target rich environment through their policy. The only thing that should have to be proven is that 1) the Theater took on the protection role for the safety of the patrons 2) They were not kept safe (which is obviously did not happen)
Free choice allows me to go on amusement park rides, but does not negate the responsibiltiy of the amusement company to keep me and my family safe while I am on it. They have responsibilties as well.