Caspertruth666 is a bluepilled activist and linguistic prescriptivist who created the subreddit inceltears. His main forms of activism are his attempts to alter the definition of the term incel from its original definition proposed by the first-defining lexicographer Ton den Boon and the coiner of the unabbreviated form by Antoine Banier. He seems to have partially named himself after the hypergamy concept, the "666 dating rule".
His/her account got suspended from Reddit permanently after doxxing someone. Some of his critics have asked him why he thinks that cherrypicked quotes represent the whole. He has never answered any of his critics.