The world is turning into a very dumb place.
Not really, though it does seem that way.
1) YouTube, Facebook, email, IM, all the modern methods of communication on the Internet make it very easy for incidents which are rare to be seen by many, many more people than in previous decades. Those types of videos were taken decades ago, however it was EXTREMELY unlikely that one would ever stumble across videos of these things in one's day to day life back then. This makes it feel like these things are much more common, when in fact, they are much less common, it is just that the videos are much more widely distributed and much more easily found and viewed.
2) Almost all of us have done things in our youth that were very stupid and that would have gotten us thrown in jail, if we were caught. I don't know a single person that led a life of purity and in the 70s, 80s and 90s. We ALL did stupid stuff, and if you didn't, I don't believe you. Unless my kids are a LOT sneakier than I was, which is unlikely, but possible, they'd be caught.
Example, I don't know a single child today that has played
Lawn Dart Roulette, yet it was played daily where I grew up, in the three days between invention and local ordinance outlawing it. It is a 10-12-player game, and alcohol is required; all players stand in a circle, arms length away from the next guy. Main Asshole of the group, whose house you are visiting, and whose family owns the Lawn Darts, picks a rube at random, who must throw a lawn dart straight up, then look straight ahead, and not move. The lawn dart will harmlessly land in grass most of the time, but about one in three full turns (48 throws) the dart would land in some poor bastard's shoulder or skull. Participation in this game is guaranteed to accurately predict the arrival of both the EMTs, Police, and result in the arrest of at least one person with an outstanding warrant they didn't know about. Oh, if you move while the dart is in the air, you had to lay down while everyone got a free kick in on you.
My point is that people were plenty fucking stupid 20-30 years ago. My hometown was PARTICULARLY stupid, as I'm sure you have guessed, and stupidity is not anything close to a modern invention.