As I stated before, we live with our blinds open and sometimes our windows open. If someone comes to the front door and we're in our office, they can tell we're home. Most times, they'll ring the doorbell, knock on the door and if we don't answer, they move on. We had that one guy I spoke of earlier in this thread and just yesterday, we had another persistent door to door salesman, a younger guy.
He came to the door, we were both naked and at the computer looking at pictures, again. He rang the doorbell, then knocked. We didn't answer. He rang the doorbell again and knocked again. I looked at Di, she said, "maybe he needs the same treatment the other guy got." As I got up to go answer the door, he walked away. He also looked back at the office windows but only once and then moved on. We really need that sign on the door!