(probably other examples too. This just floored me as an American)
(The link in the article you posted mentions 97 cases of abductions; it's important to note that 100% of abduction cases involve the child's family, e.g. in custody battles and similar. A kid getting snatched off the street is a once-in-a-decade thing or rarer, and it's never an infant.)
Pickpocketing is only a concern in tourist traps like if you went to visit the tower of Pisa out something.
And waking around my university buildings, it's very common to see people leaving their stuff including expensive laptops to reserve their spot in the library and random tables in hallways that have them. Though this is frowned upon if you're going for more than a few minutes.
I have not spent a huge amount of time in Europe but judging from the way certain minority groups are spoken about by many Europeans, it is not a widely held belief in Europe that pickpocketing is limited to tourist areas - although I'm sure that's mostly true.
It’s always a culture shock for me to travel to other places in America and see bars on store windows, homeless people, signs telling me not to leave stuff in my car. I can’t understand how people let things get that way or why they allow it to continue.
Edit: this is in America. In Eastern Europe, where petty theft was widespread, I’d only do it in upscale locations (e.g in the de-facto ‘embassy’ district) or when I was friends with the staff and could trust them to keep an eye on my stuff.