Try the UK, Denmark, or Germany for knife law. It more or less all boils down to nothing over 3 inches including lock knives which is why Sal over at Spyderco made some fiendishly clever models for the UK and Denmark which did not lock. The UKPK model and I think the Danish one was the DKPK.
I have even seen people pulled and have the larger multitool type knife confiscated. And soldiers coming back from deployment have had tactical style knives confiscated at customs.
If you carry a blade the law requires: Lawful authority, or reasonable excuse, ie you need it for work, or you better be Bear Grylls out in the wild.