I know someone who got had by a spearfishing call. They knew all the details about his phone contract, sounded 100% legit. The scammer got thousands of dollars in prepaid SIM cards from his account.

After the police investigation, turned out that the scammer was actually a former employee of the phone company who downloaded a copy of the customer list when he got fired.

pi ends with the digit 9, followed by an infinite sequence of other digits.

That’s a very interesting use of the word “ends”.