This is a generalized opinion, derived from having just completed the Tn. State BEA taught by the following individuals:
Joe Stiles (TAPBA), Scott Olson (NIBE), Scott MacLean (NABEA), and Scott Harrell (Compass Point Investigations).
This issue arose during this seminar, as it always does and probably always will. An immediate question from this esteemed panel: Why would you want to open-carry ? They expanded further:
1) It is not a good idea, whether or not you are legal to do so, to open-carry at any time. It was further explained that even during a routine interview of witnesses, 3rd parties, etc. that if you ever touched your weapon, like resting your hand on it as many former cops are still in the habit of doing, you may have possibly just committed a crime of an aggressive nature, i.e. an act of aggression.
2) The very presence and visibility of a weapon puts people ill at ease and draws unwanted attention to yourself.
3) People may also, incorrectly, mistake you for a LEO which may lead to impersonation charges.
There are other reasons for not displaying a weapon publicly. It has the tendency to create more problems and liability than it solves.
Again this is just an opinion.