Yes. It's fun, and also it helps you keep in perspective how vulnerable your own information is.
I have never doxed anyone publicly or for malicious purposes. It has always been a private hobby to pass the time. Sometimes people I know IRL, but it's more fun to look into people met in passing online who think they're hiding
Here is the scary thing: people have told me personal information about themselves, 10 years ago, that I never could have used to find them at the time, but because of how information has changed online, it is now really easy to find them using those details. If I can't find someone today, I'll probably be able to find someone in 5 years if I care enough to remember, unless they're really trying to hide.
A lot of it becomes possible due to various big data dumps/leaks, they let you snowball a single data point like an e-mail address into more data points that can also snowball. That's the really scary thing, imo. I want everyone to protect themselves online, and not just the obvious, public stuff.
Oh yeah, also a lot of things people think is private is actually publicly available info and not even behind a paywall and it's all legal. Be careful out there.
Semi-related, It reminds me a bit of how criminals get caught for crimes they committed countless years ago, before DNA evidence was a big thing