I have been robbed exactly 0 times since Facebook launched. I've certainly never had any tell me they got robbed because they posted on Facebook. I wonder if you might be exaggerating a bit? Besides, I'm not Facebook friends with anybody in the local burglar community.
Just to re-center on this point, maybe there's a cultural and crime difference between the US and the UK.
In the US, it is common security wisdom to not advertise that you are going on vacation next week or at a restaurant, or your spouse is out of town on business. I cannot confirm if there were actual crimes based on those kind of posts, but that is the security advice going on. Plenty of folks do it anyway. To me, your comment is as if you'd never heard of this, which boggles my mind. Everybody knows this. It is known.
Nextly, last year, my house was broken in while I was out of town for 3 days and my wife was at home. My truck is normally in the driveway almost all the time, except for then because I had to park at the airport. My wife went out for 2 hours in her car, and that's when it happened. No, I didn't post online about my travel plans, but bad guys ARE observing neighborhoods and noticing patterns (like the one day that house has no cars parked). it can be as mundane as noticing parked cars, but online information also lures criminals in now.
last month, a girl got raped in TX when she went to do a trade with somebody from craigslist. Granted, that's craigslist, den of people I don't trust.
Given that most IT crime is inside jobs (80%) and most sex crimes are somebody you know, just because I think I know somebody on my friends list, doesn't mean I really know them. Or that their friend doesn't have access to the laptop or phone to look for trouble that I can't anticipate. Thus, a key risk social media invites is sharing stuff more broadly than you expect and having somebody who is connected to you decide to take advantage.
The US is chock full of people who do not take my points seriously. But my position is pretty common in the info security world, even if the actual risk is low for normal folks who don't over-share.
Personally, I think it would be pretty fun to take pics of my trip and share them on FB. But my gut tells me the internet does not need that data that I am not home and the pics can wait until I upload them when I get home. It's simply an unnecessary risk to take for something that can wait. like responding to a text while driving.