All the time. I walk around the house naked without even a thought to whether the neighbors can see.
Maybe if I lived in a very rural area I'd be more modest and close my blinds, but growing up I lived in CT and NYC I never worried about anyone seeing me naked. Now I purposely make sure my blinds are always open, but that's because I've become a chronic exhibitionist. I would only close them if I was having sex or obviously playing with myself if I thought kids might see.