This really feels like the long consequences for "it's just a prank bro" and "it's a social experiment (to totally misguide you into a behavior and claim it's a prank")".
Author of the article, I replaced an actual IP address with 127.0.0.1 because I didn't want to list some random AWS IP on my blog without knowing who it is related to.
Anyway,
I suppose there are no IP anyway and the reverse proxy doesn't forward them.