A lot of folks blame this on kids simply not wanting to go outside anymore. But I believe a significant dimension to it also lies in the fact that the world is a lot more hyper vigilant about punishing things like trespassing, loitering, hooliganism, and the like.
The woods? Whose woods? Someone owns that land. Are they gonna call the cops on you if they notice you're in there? Do they not want you damming up their creek? Is that going to be considered vandalism? Do they not want to be liable if you injure yourself on their property? All questions that probably aren't in a kid's head, but I imagine would be on a modern parent's. The safety risks are high. Always were, that's not new. But the legal risks are new.
And yeah, it's not like getting in trouble for these sorts of things didn't happen back in, say, my dad's childhood. But I'd wager my dad would have gotten picked up by cops in his youth and sent off with stern tut-tut by the local sheriff for being just another incident of rowdy boys being boys, while my kid (if I had one) would be far more likely to make it out with a criminal record if they're old enough, or trigger a lawsuit against me for my negligence if they aren't.
Getting static shocked by the TV screen.