I stuck one on the corner of my LG TV years ago, and I can't tell you how many people came to my house and said "You have an Apple TV? I didn't know Apple made TVs!"
I then had to explain that I DID actually have an Apple TV, but it was just the small box sitting close to the TV and the TV was actually just an LG TV with an Apple sticker. Such confusion.
I've always placed a small one in the bottom corner of my rear window. When we bought our truck last night year, I dug up an old "rainbow" sticker for the other corner.