Oh look, OSX has touched this usb stick, and vomited it's dotfiles onto it. Did it ever write to the stick? Nope, just need to throw those trash dotfiles onto every. single. thing. it. sees.
> Windows scatters files all over the place!
Just have a look into your Library folder on OS X. Also some programs don't use that, but create a dot folder in your home directory. Maybe I'm missing something though? I haven't used OS X much lately.
Apps which use dot folders in the home directory need to be smacked until they stop, but the OS can't really control where (non-sandboxed) apps put things, it can only establish conventions and encourage apps to follow them.
Also I remember a tool I used when I had a Macbook which helped you remove all the files when uninstalling something. I think it was this one: http://www.macupdate.com/app/mac/25276/appcleaner I remember some programs even putting files in other directories than Library Support.
No. Just No. Windows loves to "forget" things. Things like Bluetooth devices. Or wifi devices. Windows likes to update your laptop for you when you're trying to close it ("Don't turn off your computer..." Wait, what? I have a plane to catch!). Windows scatters files all over the place! And that registry. UGH!