"you cannot be using it to commit or plan to commit a crime"
You can't use it to plan a crime?
Don't write your plan on or with the sword and you're all good.
i use a 3ish inch
I paused there to giggle a little...
I almost always have some sort of knife on me, not like those handicap-nerds who think that if they get spontaneously mugged by bullies they can fend them off with 0 knowledge or knife experience, but because they are useful as forget for so much stuff and getting caught out without one is annoying.
Also to take out people that mug me because of my knifing leet skills.