I've been pondering this a lot lately and I would like to get the input of the forum. With all the frivolous and crazy lawsuits that have actually gone to court, and a few that have even been won, I think this one is actually pretty sensible.
It's an indisputable fact that every mass killing we've heard about in the last few years has happened in a "gun free zone" hereafter "GFZ." Every single one. This is a fact and it's not open to debate. Therefore, since GFZ's are the common denominator between all of these deaths, and since GFZ's left the door open for these murders to take place, and since GFZ's act as an enticement to those who want to kill as many people as possible, I'm actually surprised that no one has filed a lawsuit over it (as far as I know).
Think about it. Lawsuits have been filed over much less, like if a screw was the wrong thread pitch in the steering system of a car, and that one weak screw "might" have made a difference of 0.0034" of clearance while cornering, etc..... This isn't a literal example, but you get the idea.
And here's the thing; even if such lawsuits ultimately fail, they still cost the defendant money. That's not to mention the stress factor, the bad publicity, and in some cases, leading to policies and procedures being changed.
Before anyone says that "that'll never get off the ground!," understand that you're probably right. That's not the point. The point is that a very logical case can be made that by posting "No Weapons" signs, it only prevented the law-abiding from being armed, thereby filtering out anyone who could have saved lives if they had been armed.
One last thing...... this topic has obviously gotten some attention lately. Wayne LaPierre, Larry Pratt, Ted Nugent, Jesse Ventura, Ann Coulter, and others have made reference to the GFZ being a bad and dangerous idea. So maybe the time is right for a high-publicity lawsuit. At he very least, it could point out to the public with a credible argument that the way things are being done, and have been for years, just isn't working very well. I'm totally preaching to the choir here, but I think it's time that Mr. and Mrs. Couch Potato out there were made aware of this point of view. A high-profile lawsuit would be an excellent way of getting the idea across.