When I lived in NV they allowed OC except for in banks, POs, courthouses, or liquor-serving establishments. It was uncommon to see anyone carrying openly, though, because folks were aware of others and if in a public place carried concealed if at all. Lots of pocket guns, though. But every now and again you would see the rancher come in from the range with a wheelgun on (hardly ever a western holster, typically either a OWB or a crossdraw, but some shoulder rigs), or someone carrying a semi in a OWB holster. I think folks are aware of the effect a visible gun has on others, and the inability to control the situation in a crowd. Also, there is the factor of certain types of people not knowing who has the gun that makes them mind their manners.
Never try to educate someone who resists knowledge at all costs.
But what do I know?