Why would you want them to know this? Do you not think of privacy as being a desirable default in your life? You might be thinking of just some random logs getting stored somewhere, but I think of a person being able to access those logs. Do you want me, Joe Schmoe, to be looking over your shoulder every time you grill? You might not notice, but surely you'd be creeped out to learn that some guy has been peeping through binoculars at your thermometer whenever you're in the backyard. It's not just the temperature data either - it's the fact that they know what you're physically doing at a certain time and location.