Lol, kids doing crazy things is nothing new, even way back when you were a child youngsters were doing stupid things -- it's called part of growing up for many people. We just see/hear more about such things nowadays simply because of the fact that news/info are so much more readily available due to internet, social media, etc.
Yes the boundaries are continually being pushed forward -- hence the the crazy if not sometimes stupid videos you see -- but so is the overall skill level in many sports and pastimes: kids (and adults) nowadays can do things on skateboards, bicycles etc. that would be unbelievable/unthinkable back in your time. As an example a 10-yr. girl old recently climbed The Nose on Yosemite's El Capitan! This was not done by adults until 1957 -- and it took them 47 days...this rocking little lady did it with her dad in 5 days.
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I won't deny that kids (and adults) are getting crazier -- e.g. Tide pods, snowflakism, mass shootings every other month, etc.), but there's still a lot of awesomeness out there as well.