It's not only a teenager or college kid issue. I've seen adults with a computer in their bedroom because it's a kind of private space where they don't expect anybody to inadvertently bump into it.

My laptop is in my bedroom in winter, right now, because it's one of the smallest rooms and I can heat it easily. I use it in other parts of the house in the other seasons. I do have a sliding cover on the camera. I bought it years ago. The main issue is the microphone.