Originally Posted by GingerJohn
Maybe, but on the other hand someone capable of hacking this system is probably not going to need to physically break into your home anyway.
I agree that my concern is just one more tool in an already overflowing toolbox, and may not be enough of an added security risk to toss out the energy savings potential. But I think the possibility should be acknowledged, examined, and steps taken to minimize it - it should at least come with some basic security to keep out the lazy cybercriminals.
The people who could collect the data would not necessarily be the ones doing the breaking-in. For example, they could sell lists of addresses where the entire block is probably not home all at the same time, allowing criminals to more efficiently target areas for the application of low tech methods.