The kids who grew up with social media practice about as much infosec as their boomer grandparents. Apparently only those who grew up in web 1.0 learnt the value of not attaching your virtual shit to your actual identity.
Yeah, I've always seen this trend among modern kids. They put everything on the table, "in true boomer fashion" like an user said some time ago.
When I was a teenager, I've posted in many forums, but no user of sane mind (me included) ever thought about using his real name, and even less using his true fucking face as an avatar.
I know I sound like a disgruntled boomer, but KIDS THESE DAYS have grown up with sites like Facebook, that encourage them to put every personal info they can online. Of course, the results are catastrophic: doxxing them is trivial, you just have to look for their true name on Google and you'll surely find a page, somewhere, where they've written their true name, all of the usernames they have used, links to their accounts on a shitload of sites, etc.
After all, "digital native" doesn't mean "clever": it just means that you're born with a fuckin tablet in your hands, not that you know how to use it and how to behave online.