Brad, that's why I always try to fly Southwest. They discreetly place the **THIS IS A GUN** tag inside the case while I'm standing there.
The fact it's in a safety yellow Pelican case with big locks on it does call attention to the case itself, and that there's something of value inside it, but folks do tend to notice someone carrying something of that size. I've heard thieves hate to draw attention to themselves.
Regards,
Rabbit.