Everyone Can See This

It's happened again. Dad sees something on his computer screen and he thinks that everyone can see it. He seems to think the computer screen is like a TV and that people can tune to a specific channel and see what he is seeing. This morning I was screen sharing with him and I went over a series of emails that had gone back and forth between me, Dad's lawyer, Dad's financial advisor and a trust accountant. After going from email to email, showing and reading my initial query, the response from one person and the next, Dad commented, "I hate this!" I asked what he hated. He responded he hated that everyone could see his business. When I asked what he meant, he said that anyone could see it - I'm not sure whether he meant on a TV or a computer, but he felt that what he was seeing on his screen was something accessible to all people, someplace, somehow. I tried to explain it, and he sounded a bit relieved, but this time I'm not convinced that he was really satisfied with my explanation.