Re: IoT
Criminals, by their very nature, do this to anything you put in place anyway.
But, equally, criminals don't like alarms going off (even if alarms are next to useless). They certainly don't like the ones that inform the owner or summon help when the alarm goes off. They don't like that I can see them approaching my front door and have months of video to trawl to find that guy that I was sure walked past four times the day before that house was robbed, etc.
Criminals aren't going to stop just because you don't have this gear. And the real fact? Criminals are so simple (that's not an insult, their methods are NOT complex) that they don't need to have IoT to do all this stuff. Decide when you're out? Knock on your door. If no answer, then look around side-alley. Nobody will be the least bit suspicious. If you answer, "Hi, I'm just the area with a company called..." and nobody's any the wiser. Or look for a light on or (more relevant nowadays) a car in the drive (or absence of one).
And it's precisely the point of the IoT (that things are SO cheap that they are ubiquitous) that proof that you actually have money doesn't come from the camera in the porch or the lock on the gate or the smartphone gadget you took in, but by the size of house and what car you drive.
Hell, if they WANT to get into YOUR house, sorry mate, there's nothing to stop them. They can just wait for you and your family to leave in the morning if they're really that invested in taking YOU specifically.
Criminals work by simple methods. They aren't going to sit hacking your remote-control RFID gate-entry lock. They'll just look around innocently and then jump the gate or kick it. I guarantee you that nobody will notice until it's too late. The only way to stop them is to discourage them. And CCTV - though far from perfect, as those simple criminals have worked out to wear a hat to hide their faces! - is something that puts them off. Alarm system put them off. Especially if they suspect the guy in there is smart enough to connect it to his smartphone, and has CCTV that he might be able to see, and that he - as a burglar - will not know anything is raising alarms with the owner until the plod (or, worse, the owner!) pull up outside.
You know you can get fog-security kits for tiny prices now? CCTV is dirt cheap. Alarms, maglocks, RFID entry, GSM relays and alerts - some of these are in the £10-20 range now. An enterprising geek with a bucket of cheap gadgets and time on his hands is likely to be the worst person to try to target. (But they don't target. They're mostly opportunist when they see that the back-gate - which you could have just put on an automatic spring and maglock - is left open by mistake). Same with cars - the junkiest old car, for £20 on Amazon and bit of wiring - can be silently GPS-tracked live on the owner's smartphone and they can cut the fuel pump with a text message or just send the live Google Map to the police.
IoT isn't a criminal opportunity any more than you allow it to be. The devices need security, yes, but they provide a lot more. You can't even get a response from my GPS tracker unless you have a registered and verified phone number. Finding it would be a work of art because it's so small you can bury it anywhere there's a 12v line. Cut the power? It has its own battery backup good for 24 hours.
Same with the CCTV, the access control, whatever else you decide to wire up. Even that junk that they want to put on your power-meter? Sure, it might be insecure but it LOOKING like you're at home (how's that work in the summer and with automated central heating nowadays?) is different to KNOWING whether you are home and, eventually, they still have to visit your home to actually find out.
You know what's infinitely more dangerous? The car park booking at Stansted airport. When you book you give your name and address and tell them how long you'll be gone. Bloody dangerous. But, thank god I have IoT junk all over my house and can phone a neighbour if anything untoward occurs while I'm in a foreign country.