in my teens i did some casual train hopping in
Russia.It was quite fun and even if you got spotted no one gave a shit, they or just worried for your safety. Later i tried the same in Austria; catching from the main marshaling yard in Vienna. It went alright, but i did get seen hopping off and had to run out of the yard.
This was before the migrant crisis, so i can imagine things are much stricter now.
It's fun but you need to know about trains and singles, and now cameras aswell. Back in Russia we had a kid who fell on the track trying to catch at night,
Thinking back i did alot of stupid shit as a kid, it's a wounder im still here.