No, not the Raspberry Pi-based spam blocker, but a case of insidious trolling:

Screenshot: /r/programming/

This specific Reddit user obviously uses the digits of π as their username – so far, so common.

It is only if you have taken some wrong turns in your life and have memorized the first 21 digits of π for fun that you will be appalled to notice that the last two digits are wrong! And you’re stuck with that – the user in question will know very well what they did, and it is way too nerdy to rant about…

Well played! :)

PS: If you only know as many π digits as your 1984 pocket calculator, you might still “enjoy” the opening sequence of Pi, the movie: