The reason why people find open carry of a long arm in an urban or shopping area to be pointless, tasteless and a "poseur" act - in the old French sense of the term - is best summed up the late, great "gunners' guru" Col. Jeff Cooper. Cooper pointed out that a handgun is a defensive weapon; one that you have with you "in case" you get into a fight. A long arm, he said, is an offensive weapon; one that you have with you when "you expect" to be getting into a fight. To carry around a weapon as a prop (presumably no fight was anticipated today at Cabela's - therefore it was a prop) is gaudy and disrespectful of something as wonderful as a fine weapon. This is not a modern, sissified point of view. I grew up in a time when we all had shotguns in our (unlocked) vehicles in the school parking lot because we'd hunt on the way home, and nobody thought anything of it. Shotguns and rifles were just tools of the trade for farmers and ranchers and were in the back of every pickup window in town. But even then, you'd have been a weirdo to walk around the farm store or CO-OP with one over your shoulder.
It's also strategically unsound because, for the many Nebraskans who are concealed carry permit holders, a person coming into an urban retail area with a long arm is exactly what they are looking out for. Hopefully they are all smart enough to not go into what Cooper called Condition Red, but it would seem to fit his definition of Condition Orange. To quote him directly....
Orange: Specific alert. Something is not quite right and has your attention. Your radar has picked up a specific alert. You shift your primary focus to determine if there is a threat (but you do not drop your six). Your mindset shifts to "I may have to shoot that person today", focusing on the specific target which has caused the escalation in alert status. In Condition Orange, you set a mental trigger: "If that person does "X", I will need to stop them". Your pistol usually remains holstered in this state.
Thus, to intentionally cause people to be in Condition Orange to make some sort of fashion statement is also juvenile.