Now, for your questions:
#1: If you wanted to chit-chat about my various CZ's or Colts, or Olympic Compitition at the local coffee shop, while you are off duty...no, love to. If you wanted to talk to me in an official capicity, It would totally depend on the circumstances. Most likely not. I have a family friend that is in the WSP on the wet side, and in an official capicity I would prefer he leave me alone, (and he does leave me be, officially, even though we go out shooting together, and he even dated my sister for awhile years ago)
#2: I conceal when it is cold enough to wear a coat, and then only because I have a coat on. Why? Training...back in the 50's I was told that "only those up to no-good conceal their weapons"...and comfort...It is much easier, and more comfortable, to carry my full sized Colts or my CZ 85 in an OWB holster which is what I do. I do have a shoulder holster, but I can't stand it.
#3: Nobody bothers you in my county when you OC. No-one notices, too many people do it.
#4: It has been my experience that OC is a great way to NOT be bothered by Bad Guys. I have been in only one situation in over 40 years (I became a US citizen and began OCing in July 1970) where my carry definately defused a very bad situation...a guy that was intent on beating me to a pulp,,,until he saw I was armed (my Colt never left the holster, just seeing I was armed and all of a sudden he had better things to do elsewhere, and left very quickly) I personally have never heard of a felon that was OCing. Felons do not want anyone to know they are armed, why would they display their carry? Now if you are talking about a guy displaying his weapon with the intent to intimidate, that is not open carry, that is an open display...much different.
What should you teach your students? The odds (Probability 99.9999%) are that a person carrying a pistol in a holster and doing nothing with it except carrying...shopping, walking down the street, in the bank, driving his car, whatever normal activity he is doing...is not a threat to anyone, and would probably be the first one to come to your aid if you needed it. This includes people with a $100 pistol in a $20 holster, as well as the guy with the $3000 custom Dan Wessen, in the $125 Alessi leather holster. Because some people are more fortunate financially than others, does not make them better (or worse) than the less fortunate. The best thing when observing someone that is OC, is to just drive on by, wave if you wish, thumbs up...or just ignore is just fine,,,unless you need help,,,then ask for it. We'll do our best for you.
Now I will ask you...Last winter my wife and I were driving down the hwy and caught a bunch of snow that almost ripped off the skid pan on our Audi A6. I was at the side of the road trying to resecure that side pan when the local WSP LT stopped to see if I could use some help (and very kindly offered some of those huge tye wraps to hold the pan up until we could get home and fix the problem perminantly) BTW: he never asked my name, asked for my CPL, only if he could help...
I had on a $1500+ Colt in a $125 custom Alessi holster and was driving a $60k car...now does that make me better than the guy that has a $100 Chevy Vega, wife and 5 kids and a $200 CZ82 in a Czech duty holster? (also me, years ago)? I happen to tan very easily also, BTW/
Edited to add: I am a retired business owner. everything we own is paid for, we have no consumer debt. Has our financial situation improve over the years? Yes, quite a bit. All 5 of our kids are out of school, married and on their own...with no student debt...yes, the Good Lord has belssed us abundantly/