Crash,
Not sure about the US, but in the UK you are allowed to take pre-emptive action against someone if you perceive yourself to be in immediate danger (I nearly said "clear & present").
For example, someone holds a knife in front of you, you smack them over the head with an iron bar. That's what happens when you threaten people with knives IMO.
Mark
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"I can't prove creationism, but they can't prove evolution. It is [also] a religion,
so it should not be taught....Christians took over the school board and voted in creationism. That can be done in any school district anywhere, and
it ought to be done." Says Kent "consistent" Hovind in "Unmasking the False Religion of Evolution Chapter 6."