This is where you would most likely get in trouble with a MWAG call.PC §46.035. UNLAWFUL CARRYING OF HANDGUN BY LICENSE HOLDER.
(a) A license holder commits an offense if the license holder carries a handgun on or about the license holder’s person under the authority of Subchapter H, Chapter 411, Government Code, and intentionally displays the handgun in plain view of another person in a public place.
Also, that thief who is lurking in the parking lot now knows where to steal a gun.