You need to add the dobermans - the old fog&dog gets 'em every time.

> I have found that the fog generating alarm systems are the ones that will stop burglars in their tracks.

We have one of those at our vacation home (well it's more than a vacation home: I used to live there but it's now house we use for vacation, several times a year but anyways...).

We've got that system connected to the alarm. It's amazing and the system did evolve: in the early days the fog had to be projected in the middle of the room or it'd leave traces on the walls. Now it's a fog that doesn't leave any trace anymore.

The reason it works so well it's that it means: "Now you cannot see jack shit and in a few minutes the police is going to be there".

It kicked in once: the bad people quickly left.

> If they can't see, they're not going to hang about ...

No indeed...

> and if they've tooled up with NV then that's a whole different threat model.

In my case the alarm is still there and if the company monitoring the alarm system tells the police "there are people dressed up like it's war with night-vision system", then they'll take it even more seriously.

I've had a house without my alarm on (because kid had a medical emergency and was between life and death: I left in a hurry and forgot to turn the alarm on) visited by burglars and it ain't a fun thing.

I highly recommend alarm systems that generate a fog. It's a wonderful thing.

And that fog doesn't last too long: by the time your back at your home, it's like the would-be-thieves: gone.