We were out of town on vacation with the house locked and security system on, however, 6 nasty movies were watched on netflix. Netflix says that the flix came through our Roku device. Is it possible to hack into the Roku? We are positive no one was in our home. If so- any suggestions on preventing it from happening again?
Some questions for you, if that's okay. You seem to know some movies were watched that you did not watch. How do you know this? For example, did you fire up your Roku and in the recently watched line you saw six movies you know you did not watch? Or did you find out another way. You indicate Netflix says they played through your Roku. Can you confirm via Netflix's website that only your Roku is associated with your account? Although I'm fairly certain a particular Roku keeps its own recently watched list, if you found out a different way maybe someone else associated a Roku with your account to watch them (although they could have removed it by now too.)
If it turns out the Roku in your home is the exact one used to watch the movies, in all honesty you're faced with two logical possibilities. One is that someone with allowed access to your home watched those movies on your Roku and isn't fessing up (or hasn't been asked...like a neighbor or relative you asked to keep an eye on the place and knows the security code. Come to think of it, is there anyone you've given the code to in the past as an emergency person to have access to your home?) Two is that someone broke in and used your Roku after disarming your security system, and reset everything when done. Obviously, number two is a big longshot.
I'd start thinking about friends, neighbors, relatives, and people who live in the house and who might have done it. I just don't see hacking the device or your network leading to shows being watched through your Roku.