Couple of weeks ago, DH and I were looking at a house in the retirement community where we own rentals. We were interested in this one and our Realtor had previewed it for us. We knew the house was empty and the owner lived out of state. We pulled into the driveway, and as we often do, went around the back of the house to look for clues to the overall structural well-being of the house first. There was unopened mail and two packages addressed to the owner on the back patio, so we really were convinced the house was empty. DH mentioned that he needed to take a wizz. I told him to water some plants, as they looked thirsty, so he did. We continued our exterior inspection, and were intrigued enough to take the next step, which was to officially arrange a viewing with our Realtor. On a whim, I went to the front door and looked in a window. OMG, there was someone sitting at a computer desk, with their back to the window. OMG! We were very blatant about our visual inspection! We can't believe the person inside had no idea we were there.
We found out later that it was a guest of the owner, but we were too spooked to view the house and it's now pending, so we're obviously not going to be the next owners. Moral of the story: Be careful where you pee.