1.The law abiding citizens would turn there guns in
2.Some former law abiding citizens would be turned into criminals because they were forced to choose between protecting their families or breaking the law(I pray that I am not faced with this decision)
3.Violent criminals would not turn their guns in and they would become more active knowing that their victims were unarmed(hasn't anyone seen the John Stossel jail house interviews)
4.Crime rates would skyrocket
5.Deer and moose populations would increase causing more accidents
6.The various varmint populations would increase causing numerous problems for farmers and ranchers
7.Eventually chaos would take over and the laws would be repealed after it was too late.

I'm sure that I haven't even scratched the surface.