Recently it is coming to light that more and more property owner’s have cameras in their homes either for security or baby monitors. What this means however is that a buyer and their agent may be watched and listened to while previewing a home. Yes, I think this is creepy too. Recently it was reported that a seller listened to a conversation that a buyer had with their agent about how much they wanted to spend if they put in an offer and why. This buyer told their agent that they wanted to offer such and such but that their top number was such and such. The seller heard everything and knew to counter their offer because he knew they were willing to spend more.
A seller also watched a buyer and their child go through their home, watched the child pick up a breakable porcelain bowl and put the bowl back down.
Best advice, have discussions with your agent after you leave the property and insure that all of the seller’s possessions are respected.