Unattended things may be robbed.

I remember once entering a train with my mother- and brother-in-law. We wanted to join a guy in a four seat section, but his bag was on the seat. My brother-in-law offered to help him stow it in the luggage rack and the guy was shocked. There in the rack were massive unattended bags. The guy looked at me and said, "people just leave them here?" I shrugged and grinned. It was true and I loved it. People just left there stuff and it was there when they got back.
Moving from Philadelphia to Zürich was like moving to the 1950s. Children ran free with out an idea about "stranger danger," Sundays were all about family, women got time off for having babies in a meaningful way (well, maybe that's not so 50's.) I loved that people would leave there bags on the train and be sure that they'd remain safe.
Ah, but all good things must end and the newspaper this morning brought the news that we must be more careful with our belongings in the train. The funny thing is, it wasn't even the big bags on the train that they were worrying about. The warning was that things of worth (laptops and wallets) should be kept on your person where you can feel it. This is insane and still super encouraging. Apparently, I still live in a partially idyllic land, I guess.