fd - statistics/numbers don't prove anything, They can suggest a correlation though. Even if I did give numbers from England or NZ they still wouldn't suggest a correlation with anything to do with the US.

The idea of gun free zones is just stupid. They only way to enforce them would be to thoroughly search every person entering them every single time, and to make the perimeter completely secure. That is one of the reasons the gun laws in NZ are effective - we are an island nation with tight border controls. The same laws would not work in other places given the open borders between states in the US and between countries in the EU.