This would be bad; we've already had a few cases on HN where someone noticed that they could increment the customer number in a URL or similar, resulting in police action.

Got a source for that?

Not from the US but https://www.cbc.ca/news/canada/nova-scotia/freedom-of-inform...

This news segment goes into more detail about how he downloaded the documents (by incrementing the document id in the url) https://x.com/Brett_CBC/status/984751373525901313

Wow, just wow. How about charging the website builders for negligence, for failing to protect sensitive data? Simply incredible.

IDOR is a well known security issue that can result in exactly the scenario described (someone incrementing a counter in a url) and has on many occasions in different jurisdictions caused legal issues for the person doing it. Unless you are specifically asking for a hn reference, which I don't understand the relevance but I'm sure they exist.