"Startle the horses.", 9-11-2001, CC licenses-permits...
This subject has been posted here and on other well known firearms/tactics sites. I, for one agree with sworn LEO-tactics instructor, gunwriter Massad Ayoob; "Don't startle the horses."
He based that quote on a early 20th century social norm in New York City. A upper class woman wrote a newspaper column about how & why it's important not to draw attention to yourself or create a scene that could lead to conflict.
"Printing" or being careless with concealed weapons(NOT open carry places) is the sign of a gun owner with poor judgement and/or a reckless mindset.
If I sat on a grand jury or were on a criminal/civil jury, I'd question a gun owner's actions or conduct based on the fact that they can't or won't follow the issue agency's laws or policy. Concealed means you conceal the weapons from view and do not expose or display anything that could clearly show your firearm(s). Sworn LEOs, federal agents, PIs, and EP agents-protection specialsts sometimes print sidearms or holsters too. It's not hard or complex, it just takes awareness & being alert while carrying a loaded firearm.
I'd add that in the post 9-11-2001 world, the "see something, say something" atmosphere could cause a CWP or license holder a lot of problems too.
ClydeFrog
ps: Some gunwriters and permit holders say showing things like pistol mags, lights, handcuffs, etc isn't a problem either. I'd prefer to conceal those items too. I'd rather keep a violent criminal or terrorist off guard and unprepared to deal with me in a real critical incident.
As Sun Tzu said; "Be where you are not expected." and "Be everywhere and nowhere."