WTF man, that totally sucks.
We need to start a vigilante gang that patrols the streets and beats the SNOT out of people that do this kind of thing. It's so ridiculously senseless too; just like Jolinars extension cords. Yeah it's funny to joke about it, but seriously, who steals extension cords and car stereo faceplates? Did you check your change tray to see if they cleaned that out too? Maybe they stole all your fuses to sell at the local flea market.
BTW, I know a "guy" who can get you a new, semi used stereo for "cheap".....