EVERY single "police" recommendation/story I read about how criminals are now doing X and we should be on the lookout for it? Utter bullshit.
Criminals are "marking" houses with little signs to indicate whether they have things of value. No. They're not.
Criminals are knocking on your door to see if you have a dog they can steal. No. They're not.
Criminals are trawling Facebook to see when you're on holiday. No. They're not. (And if you have the vaguest sense of privacy, they wouldn't be able to see it anyway).
Criminals are flying drones to see if you have anything worth nicking. No. They're not.
It's not that they aren't that sophisticated, that they couldn't do this, that there has never been a recorded instance of it, but that they - generally speaking - ARE NOT DOING THESE THINGS.
What can you see from flying a drone that will change your mind from "Oh, well, I was in two minds about this house" to "Let's rob it" (or, indeed, vice versa)?. Virtually nothing. Do you park a Lamboughini at the back of your rotten cheap house and never take it out? Unlikely. Do you keep hordes of rabid dogs that are otherwise undetectable? No.
Live your lives people. Take sensible precautions. Lock your door. Put an alarm on (and don't bother about it making lots of noise if nobody is going to care - better a silent alarm to your smartphone than something disturbing the neighbours so much that they smash it off the wall or don't care about it). And don't leave big expensive things on show.
Generally speaking, criminals are opportunists and don't care about your property anyway. If they see an open door, they'll go through it (have had this happen to me in a previous house while I was behind the open front-door doing some repairs - some guy walked past into my house and started looking around. "*cough* Can I help you, mate?" and he (thankfully) ran a mile.). If they want to burgle you, they won't wait until your smart meter reads the energy usage as low, they'll just ring the doorbell and if there's no answer, they'll force or smash their way in. Even if there's nothing worth nicking (very unusual in any house), they're in by that point so they will find something.
"Casing the joint" is for high-level planned burglaries that rarely happen outside of extremely affluent areas and they can afford their own security anyway.
Like all these things, it's rubbish.