Earbuds, Bluetooth earpieces, Badass beats earphones and so forth, walking in a conspicuous public place in uniform is goofy.
In uniform, in public, you are representing your brand. Not only the company, but as pilots.
Like all of you, I've seen the mainline guy looking like pig pen walking through the concourse holding his hat, coat draped over his arm, shirt untucked, worn out pants and black Velcro sneakers. Doesn't make it ok.
As to the person bringing up accessories, the idea is a professional image displayed. A bright red wrist trophy or a cheap plastic but black watch. I'm of the no-utility belt crowd, however the guy with the cell cover that's the stars-n-bars or just a black clip? We all know the answer.