Showing a pride flag at work isn't bringing an issue (just like having a photo of a husband and wife on a desk is not). Someone else having a problem with that and causing a disruption over it, is sowing discord and bringing an issue to work.
I'm stealing this thread because I wanted to describe my feelings, it's not related to laptops or work
When I lived in Russia I respected the rare people I saw wearing lgbt flags/pins. Because it's really a statement, it's a middle finger to the government. People knew the police can waste their time or even jail them.
Now that I live in a european country and I see more people wearing lgbt stuff, I don't feel such respect. I'm a little puzzled what's the point, you are wearing it in a country where you can hold hands, where government protects people from discrimination... It's not that you shouldn't do it, I just don't understand. Is it like a friend-or-foe id system?
Worst of all (now I'm switching from people to companies) when a company post a pride flag it feels 100% insincere. Because I know companies are motivated by profit so they only do things which don't hurt profit, they don't hold any principles.