Phil,
some great facts and details, and very interesting to boot I think the this is evidence for the support of free speech. also clear evidence that we over hear are in a sometimes enviable situation of being a fairly small contained location as compared to your vast continent. I can also understand the comfort factor involved and if I were in the same situation as you would probably make the same,inevitable choices.
Devils advocate here but the would be assailant to one of your friends may have gone away and disposed of his knife and gone and got a gun...... scary.
Cheers, Mike