Hi all!!!
I happen to know this user from another "crypto challenge" site http://www.newenigma.com/enigma. :-DDD
His public profile on that site is: https://www.newenigma.com/life/user/967/kenbrooker. Ken Brooker, alias glasshopper.
Here on mysterytwister he uses two accounts - Ken Quixote and glasshopper. He is a textbook example of internet troll.
Copy from https://en.wikipedia.org/wiki/Internet_troll:
"In Internet slang, a troll is a person who starts flame wars or intentionally upsets people on the Internet by posting inflammatory and digressive, extraneous, or off-topic messages in an online community (such as a newsgroup, forum, chat room, or blog) with the intent of provoking readers into displaying emotional responses and normalizing tangential discussion, either for the troll's amusement, or to achieve a specific result such as disrupting a rival's online activities or manipulating a political process."
Just few post of him on the forum of http://www.newenigma.com:
[attachment=2]glass1.png[/attachment]
[attachment=1]glass2.png[/attachment]
[attachment=0]glass3.png[/attachment]
By the way I tried to report his posts couple days ago but you have no option like "trolling" so I refrained from reporting because it did not fit any categories you have like "spam" for example.