Just to add info... of the three instructors I shoot with here locally, all include open carry options in their courses, and have short discussions on why concealed is better in some circumstances (you don't make yourself a target to the thugs), and open is better in others (riots in your locality, and you and a few of your neighbors are walking guard to ward off rowdy intruders and looters).
They get around the "What you can and can't discuss" by bringing it up just as everyone is rising to go to lunch! So it's not part of the actual course work, just an aside that gets mentioned ... and stops everyone to hear the questions it always brings!
They do so, just to let folks know we ARE an open carry State, and we CAN carry openly where it is not denied, which around here no where, except schools and hospitals.
There was a group that met in various resturants on Saturday morning breakfast, and shopping at Wal-Mart or similar box stores for open carry, just to exercise a right we did not want to lose. With the advent of CDWL, it sort of died out, which is a shame. We never had a single problem doing it.