Disclaimer: I can be a prude and purse my lips a bit too often.
Someone at work has the leather flag as their teams background and email picture. It is used by gay men to show they like BDSM.
Lots of people have various LGBT flags as their backgrounds/pictures which, if you don't know them can make conversations easier eg when making small talk about families/partners.
However, surely being into kink is a private matter? It's nothing to be ashamed or embarrassed about but I don't need to know that you like to be whipped. How will that enhance our working relationship? Hi Dave, did you have a good weekend? Did you get to try those new ropes out with your dom? I'm pleased to hear the new lube worked well and you don't need to sit on a cushion this week. Now, let's look at that spreadsheet...