Wow, I just had a weird feeling today.  I was in the office talking to our Head of Security (an ex-RCMP cop) discussing panic alarms in some our buildings.  I showed him a panic alarm button that gets attached to a Customer Service workstation and he wanted to open it up and take the battery out.  He tried with his letter opener but didn't work.  Without hesitation, I took out my Spyderco and clicked it open!  It took me a couple of seconds to open the case (but I really don't like using the knife as a pry!)
The guy never even flinched.  It wasn't until I was putting the knife back on my pants that I realized that if there was anybody in the company to not "flick" my knife in front of, the Head of Security would be it.  But he didn't give it a second thought - thankfully for me, there are other people in this world besides me who think carrying a pocket knife is just a regular thing.
However, I'm not a "total doughnut head" - I am going on a tour of a newly renovated and occupied Correctional Centre (min. security) next week.  The first thing I thought of was that I should probably empty my pockets of all my goodies before going on the tour, lest any of the items become "lost"!