10-12 years ago a friend of mine who is much older than me bought a laptop for his kids. When I was at his place to help him with setting up wifi I've noticed that the brand new laptop had it's webcam taped on. I asked him why he did that. He wasn't a technical interested person at all but he read somewhere that it is possible for hackers to take control over laptop and can see everything via it's webcam. I told him not to worry about it. But when I saw a foto of Zuckerberg had taped his laptops cam, I thought about my friend. And now a days a lot of pc laptops has a inbuilt cover for their cams. So, a lot of conspiracy theories have become facts in time.