Yeah, they really do take a lot of effort to remove. For one thing, they're made of very stiff material, so it's hard to even get a corner to lift in the first place. And once you do, it tends to leave a lot of residue behind. Fortunately, computer cases are pretty smooth, so it's not too difficult to remove the residue by dabbing the sticker back on the residue. Eventually it'll all stick to the sticker.

Regardless, they're clearly not intended to be removed. That said, they annoy the living piss out of me, so I do it anyway.