So, for "fun," once I asked a neighbor if she could pick up my mail while I went away for a couple days. Before I left, I left that day's mail in the mailbox, plus I put a photo envelope in there among the mail, but it was one of those envelopes that you could peel open and re-stick closed. I opened it, I put some of my best selfies in there, along with some regular vacation pictures. I positioned it so the photos would fall out of the envelope and I made notes of the sequence they were in, so I'd know if it they did.
Well, my plan worked! I came home from vacation. Went over to neighbor's to pick up my mail. Grabbed the small pile, neighbor didn't say anything. I went home, looked through it, and sure enough, the photo envelope was closed/resealed. I opened it, my heart was pounding, and the photos were in a totally different order! She had checked me out!