I hate to break it to you, but a cased gun still exists inside the case, and it doesn't prevent the muzzle from pointing wherever it's pointing. If the muzzle is pointing in the direction of people walking in the door, then that's where it's pointing. Most cases aren't made of ballistic material, so if a cased weapon goes boom for some reason when sitting there all by itself, the case will make absolutely no difference. The fact you cant see it doesn't change that fact.
A cased firearm does one and only one thing to increase the level of safety on the range - it prevents someone from being able to contact the trigger, thus preventing a negligent discharge from being possible. That's it. The fact that people are fine with being swept with the muzzle of a cased firearm is because they know the firearm can't be fired while cased. A firearm sitting on a bench that is not being handled is just as safe whether it is cased or not. Although some people may feel unsafe simply by the fact that they can see it.
Last time I checked, there are a *lot* of uncased firearms hanging on the walls at Bill's. I've even seen an employee carrying an uncased firearm around after taking it off the wall. Funny thing, no panic ensued. No internet complaints. People simply know that the employees are going to be safe at handing a firearm. It shouldn't matter which floor that employee happens to be on. It's not whitewashing, it's pointing out the difference between an actual verses a perceived safety issue. Neither should be allowed to happen, but there is a difference between the two.
For the record, the 4 rules of firearm safety are:
1) Treat every firearm as if it's loaded
2) Don't point a firearm at anything you don't want to destroy
3) Don't touch the trigger until you are on target and ready to fire
4) Be aware of what's in front of and behind your target
If you follow these rules, you'll always be safe, and will never have a negligent discharge.