My mother was the queen of this - she inspected every renovation in her neighborhood personally. She'd walk by and make friends with the workers, then ask if she could "just sneak a quick look" at the house, "because I'm thinking about doing that to my house." (Fat liar!!) Once she was caught by the homeowner - a nice young girl, Mom said, who introduced herself!!!! I said, "Mom, she thought you were a nutcase and she warned her children about you!!" I think once the people moved in she drew the line and stayed away, but anything under renovation was fair game!!
Soooo embarrassing.......