Please read my comment above, I'm not saying the TOOL or an object should be banned but a COMBINATION of a USE should be banned. And yes, the use large knives in public places where there is a risk of killing people should be banned, is there any objection to this?
Yes, there is objection to that. There's plenty of legitimate reasons to have a large knife in a public place..obviously.
There's only a risk of killing people unless you're ISIS or a psychopath. Do we ban everything because of a few assholes? Yes, we do a lot of the time, and that's pretty sad.