I am serious. That's why I posted my question about smart watches with an attitude. (Actually, I think the watch must have been picking up another conversation. We were in a crowded place.)
If you are prone to wearing kitchen utensils then it's doubtless wise to ensure you do not have a computer camera "watching" you!
Seriously though, if you are that concerned, the answer is simple. Don't use such equipment, or do at least turn the camera off, as I assume is possible!
Most people who come unstuck by using the Internet do so either by some simple oversight or misunderstanding even the most careful might make; or because they choose as a matter of course to use it in a manner potentially hazardous to their privacy, social life, or career prospects, etc.
And if you are so ham-fisted you think you have to buy a blind for a little lens then don't try anything really technical, like putting up a bathroom shelf. :-)