> I assume that there isn't a big red light on the front, because if an intruder is there then that will give away the fact that they are being recorded.
Most surveillance cameras DO have a light when they're on. An intruder may recognize a security camera, realize it's recording, and leave. Would you rather have a burglar steal possessions from your home or be deterred from the presence of a camera? (a possible problem with the Canary is it doesn't look like a camera so regardless of light an intruder may ignore it)
That said, burglars are probably wearing some sort of mask obscuring their face, so neither scenario may make a difference. What really matters is monitoring in real-time and receiving alerts of suspicious activity and acting upon it.