The "moral difference" is that the home has a higher dollar value
I don't see understand how a difference in dollar value can change the morality of an act. It can certainly make a wrong act even worse, or a right act even better, but I don't think it can change whether it is negative or positive.
plus you have a higher (much much higher) expectation of privacy and interest in protecting the autonomy of your home than you do in keeping someone from using your pair of scissors.
Fair enough. As I said, the questions of privacy are beyond me right now.