Well after reading your post I had to write a small reply.
While it is true there is nothing written per se in dictum about OC (open carry) in the KRS, it is LEGAL! The main reason that there's really nothing much written though is basically because there's nothing to dictate as with CC (concealed carry). It's plain, simple, basic, and to the bone: If you're legal to own a sidearm, then you're legal to carry said sidearm. In fact the law even goes further and states that if you're 18 years of age, you can OC, even though you can NOT legally purchase a sidearm! So OC is legal and while LEO's can stop and inquire, that's about all they can do as long as you're legally OC'ing.
As for the Disorderly Conduct issue, that's NOT! To be charged with DC you have to be either brandishing, which brings about other issues and possible charges or you have to be causing a scene and scaring people in general or specific; either one can not be claimed though if, once again, you're legally OC'ing and there's no proof (eg. camera phone photo, digital camera photo). Granted if you're OC'ing via "Mexican Carry" then it might lend some creedence to a possible DC charge but I've never heard of that one happening either. It was ALWAYS my personal observation that I NEVER encountered a criminal or "bad guy" carrying his sidearm in a holster, ALWAYS either "Mexican Carry" or illegally concealed!
As for the push for everyone to go CC, I personally agree that eveyone should seriously at least look into it for many different reasons. But I don't look down on those that are not CCDW licensed and who deicide to OC exclusively. Each form of carry has its advantages and disadvantages alike. There are far too many to even begin to talk about here but most of us already know those. Granted in an LEO encunter, if you have CCDW, you're alot more likely to have a better encounter simply because that LEO knows by virtue of that license, you've been checked out and cleared. That makes them feel safer when encountering someone with a gun.
Now there is one issue that we all might face at one time or other, the dearded MWAG (Man With A Gun) call! This one can can easily happen to anyone that practices OC, in fact this occurs far more often than a Disorderly Conduct call! People who are sadly NOT aware of the OC law, see someone carrying a sidearm and because of either their upbringing or because or the garbage they see and hear daily in the news, they automatically think that they're a criminal, a "bad guy" that's up to no good and then call the police to investigate.
Most truly hell-bent and dangerous killers will NOT openly carry a sidearm, they have a "mission" in mind and they want to carry that out to whatever bloody and deadly conclusion that might be. Most all serious criminals with murder in mind will illegally conceal their sidearm until the very last second, then they'll pull it! In the majority of cases, the only time a criminal will OC their sidearm is when they have no fear of encountering people, either LEO or civilians (except for potenial victims). They will usually OC when only alone or when encountering other criminals (eg. a drug supplier and a drug dealer). Then you have the "gang bangers" and street thugs, they are deemed the lowest of criminals and could care less who sees their weapons, to them the weapon speaks for them literally.
Personally, as long as we're carrying out there and we are doing it LEGALLY, that's good enough for me.