In ~15 years of running Linux on laptops I've yet to have anyone care what I was running looked "weird", including when running e.g. bspwm or other tiling WMs that look totally alien to them.
There are definitely environments where "weird stuff" on the screen would get attention, but that will apply even if you're running Windows - it just has to look "hacker-like" enough. So I'm not sure disguising the desktop and the file manager will help if you still spend most of your time running shell commands.
If everyone in a workplace spends all their time on corp gmail (white background) and in terminal sessions to some mainframe somewhere (let's be generous and say teal text on black in like 20pt courier), anything that doesn't match either of those appearances will stand out pretty dramatically.
I confess to stopping and asking what it was when a colleague was 3270’d into an AS/400, the font IBM used for that is gorgeous.