Not so sure that's sound advice. Only two sorts of people will notice your CCW if done right , neither of which wants to hear you say "Security".
They are cops, and the bad guys. I don't see that ending well either way.
I am speaking of your typical looney Karen or weasel anti gunner that has a freak out. If its a Cop you hand over your drivers license and Carry permit. If its a bad guy...... you dont even have the conversation. Best to just stear clear of conversations with bad guys.
I hear you though. Keep it covered and disguised while useing good manners and its a non issue for the most part. Walk around like Jason Bourne or acting like a jerk and non desirable things can happen.
Oh.. another thing. Dont fidget with your holsters if you can avoid it in public. I have seen that a few times.
Serioussly though...most people are looking at there phones all the time these days. Many dont notice because they too are looking at their own phones. I dont own one so I see a lot of strange (to me) behavior people have these days.