In DannyBee's original post, he says that the key words there are "for anyone that makes any claim (including by filing any lawsuit, assertion or other action)", and that by including the words for "assertion or other action", it encompasses claims outside of a court of law. A post on Hacker News or a tweet on Twitter is an assertion, and so would fall under this. Otherwise why include that language?

IANAL, but he is, and this is his area of expertise (IIRC he runs the open-source program for Google).