My experience with most people is that if they don't see it, it must not be there. I have had conversations while CCing with a number of people who know that I OC - they have seen me OC - and they just don't make the connection. Since they don't see a gun, it must not be there.
Second, if you do OC and run into someone from work who challenges you on your previous statement, just tell them that things change. You don't owe them a long drawn out explanation.
Finally, when I saw the title of the thread, I thought it was going to have more to do with how to handle people who get scraped when the hammer of your revolver pokes them in the side!
