So where do you draw the line? 3"? If 3" is long enough to be dangerous, what about 2-7/8"? Or 2-31/32"?

And how long does a blade have to be to be "dangerous"? How long a blade do you need to reach the jugular? To puncture an eyeball? To cut a finger?

You can't define a "dangerous" blade by its length. It has to be all or nothing.

Note: I do not agree with zero-tolerance, nor that "all knives are dangerous". I'm only trying to show that length cannot be used as a limiting factor.

Carp. Too early in the morning for me. I was responding to an old post in the thread. Carry on.