Before you start punching the buttons on the phone for the ACLU keep some things in mind:
1. I would assume the computer is company property, right? If so, their computer, their rules.
2. Your rights to freedom of speech are restricted when you are on the clock.
Pick and choose the battles you find worth fighting. If this is one of them I just hope you have another job lined up. Plenty of people here will tell you to stand your ground, or call the ACLU, but how many of them would: 1) stand their ground and risk losing their job or getting a low rating on their next appraisal over a photo.(I bet when push came to shove most would cave in). 2) How many of these guys that you know so well that stand behind you would employ you and help you make your house payment when you're out of work over a photo?
I've always stood my ground so long as my actions weren't illegal or immoral. I was terminated from one company for doing so, but hired the next day by their competition where I ended up making more money and getting a promotion. I refuse to simply "go with the flow" without good reason.
This issue is more than "just a photo". It's about our rights. Does the company policy say "no photos of folks on the shooting range"? I highly doubt it. It's about some a** trying to infringe their beliefs on another. I understand the "company property" issue. If the company has a clear policy that says let's say "No display of illicit substance use", then I would understand that as I can't have a photo of some guy shooting up on my computer screen. Since the policy is silent on what types of photos can be displayed, I feel that as long as it's not "illegal" or "immoral", then it should be an acceptable photo.
Our personal freedoms make the U.S. a very unique and special place to live. I've served many years in the military protecting these freedoms. I have serious issues with anyone who tries to infringe upon the rights that I've worked so hard to protect.
gf