Earlier quoted context omitted.
No, that's just embarrassing stuff. That stays on the web forever.
Yep, it's Murphy's law of online content. Anything you want to reference later will be gone, with no archive copies. Anything you want deleted will be available forever.
That random 20 year old video of some middle schoolers doing a flying kick and breaking a vending machine? Yeah, just popped up on my feed yesterday.