Considering how many of these stickers are about being gay or trans, compromising about expressing yourself sounds pretty grim. I wouldn't want to put that aside to get on with my co-workers.
My only point is that the "if someone is offended, that's their problem" attitude is not so black and white. People often use it to justify being an a**hole too. Obviously, gay or trans stickers are not in the category of offensive things. There are things that are appropriate to express, and things that are not. So yeah, sometimes you need to compromise on your self-expression at work because not all of it is appropriate for everyone, you know?
It's at least plausible to taxonomize them under either politics or sexuality. Either of which larger categories some might consider categorically offensive or inappropriate.
Yes, I'm also saying that "vote for $PARTY" (categorically; regardless of which party) and anime catgirls are both potentially offensive or inappropriate. Depending on how much of a stick-in-the-mud people in your local environs are.