For years my rule regarding those stickers was every time I got a new Powerbook at work I'd immediately have to go through the new arrival PC laptops and steal an "Intel Inside!" (or their later equivalents) sticker to apply to it, simply to tweak the serious Apple Faithful-types. (And it did indeed work.) Now that Apple's gone to Intel it's particularly amusing to me to see the Pentium III/M stickers still adorning my last couple PowerPC relics.

Even I was never cruel enough to transfer the companion "Designed for Windows (blawblaw)!" sticker, though.

My Mac Pro has an actual Slot 1 Pentium III CPU velcroed (adhesive-backed) to the side of it for similar reasons. (Gotta rub that sorta thing in hard when you have the chance, you know. And hey, it's like racing stripes! The fifth core makes it moar faster.)