Looking at the comments here, I guess I'm the only one who finds sadness that Apple even has to publish this document.

Some of those novelty and promotional camera covers are really quite thick. And it just seems like common sense to me that you wouldn't close a laptop with one of those things on. Just like I wouldn't close my laptop with a pen or a ham sandwich tucked into it.

But I guess Apple has had enough complaints that they had to issue something. I can only hope that the department that writes these things was shaking its head the whole time.