A friend and I slap them on the side of our windows computer when we were playing with Pear PC (old PPC emulator to play with OSX) so we could be joking legel. The ELUA stated that OSX can ONLY be installed on an Apple labeled computer. So we slapped and apple sticker on our PC and they were apple labeled.
Also it was fun to make a apple Fanboy friend our frustrated.
I used to stick mine to handheld consoles and other electronics, think there's also one on the back of my guitar... That's it! Saving the rest for a rainy day and for when I get myself a new sketchbook.