No, I think what I was saying was more a reminder more than anything. Understanding limits is useful in a conversation like this.
I don't think someone is more likely to get caught, do you have any sort of documentation to indicate that? I suspect crimes of opportunity might be more likely to be caught I guess, but not someone with any foresight.
If a thief goes in under the impression the house has a security system, it would be easy enough to prevent recognition. Oversized jacket, hat, some sort of mask. All of it nondescript/black, no logos, etc. Apply a little bit of thought to this and it's easy.
In my area, cops aren't likely to show up immediately anyway. Someone would have minutes, not seconds, to get in and out. Maybe in an area with private security or with a larger police force.
That all said though, I think people's fear of crime is much larger than reality. As I said, I think the only value I'd personally find in a system like this is the fire alerts and an emergency button to hit if necessary.