Why would this be impossible?
wouldn't it be better to put a camera outside your bedroom door with a electric lock? That way you would see who's coming towards your room and then push a button to lock it or unlock it. To me that would be cheaper then the alarm when you can put the video on your computer. But if you really want an alarm with a siren, then go for it. But I sense your going to get allot of fights over the sound when the camera system seems better to me in many ways. A door strike can work from a remote to lock or unlock.
Actually Ambrose and Rollins could be big solo superstars right now if they wanted to push them as such. Roman Reigns would just be another generic power wrestler that everybody would overlook if he was not part of the Shield. But together they are unstoppable as a team..BELIEVE IN THE SHIELD.
What do you want to bealarmed about?