Personally I keep one Linux sticker on my laptop, less about expression and more a conversation starter. It's something that 99% of people won't notice but for the 1% that notices it's a nice conversation starter when everyone is bored (ie waiting at the airport)

Need them to tell apart my work laptop from my home laptop as they look identical

"Besides nobody gives a shit about your stupid political opinions or the software stack you use."

But sure, tell everyone about your feelings on tattoos and stickers

Well, nobody cares about you're views about stickers and tattoos, but you still commented. Compared to you though, nobody here called you a retard; maybe that says something about how people are here or how you tend to use inflammatory language when it's not needed.

They won't give a shit about your political opinions as long as it's one of those in the linked gallery of corporate-friendly pre-approved ones.

Anything right of center and suddenly people start caring very much.