I think you're probably right. I had many run-ins with the police back in the 1960s and they were pretty much all good experiences, even when I had to spend a night in jail. I guess cops used more commonsense and we're kinder back then.As a retired LEO, I'd say that this is generally true but, if an LEO has stopped you and/or is investigating a crime in which you are believed to be involved, s/he will not necessarily assume that you are an "honest" person and being in possession of a knife that is illegal w/in the LEO's jurisdiction will be proof to the LEO that there is good reason to believe that you are someone to regard w/suspicion. It's the nature of the job.
But bottom line, if they want to arrest this old geezer for carrying a pocket knife, thats fine.
In the "good old days" (smile) every kid and man had a pocket knife. It was just an everyday tool, and most of us felt a certain affection for the knife we carried, especially if we had had it a for awhile.
Anybody remember a game called mumblypeg? Can't play mumblypeg without a knife. (grin)