The conversation below occured today from an NM who went into the tournament with a chip on his shoulder. Whether his opponent was using an engine or not; this type of reaction can only be found in a mindset of a three year old.
Other players have stated this isn't the first time this titled player lost it, apparently it happens quite often.
This is unfortunate, chess.com treats their titled players as gold; they attract customers, but they can also be bratty and diva-esque, as seen below.
EDIT: here is the link to the cry baby's profile: http://www.chess.com/members/view/FLchessplayer
NM FLchessplayer: another cheater
NM FLchessplayer: yet another cheater
NM FLchessplayer: mikety
mashi_: he doesn't have a perfect record though.
NM FLchessplayer: He cheated here idiot.
NM FLchessplayer: His last 10-15 moves match Fritz 12.
mashi_: I don't know how chess engines play.
Guavaguy: lol you lost so he cheated
NM FLchessplayer: BS
Guavaguy: You sacrificed FL
Guavaguy: and it wasn't sound
Guavaguy: so you lost
NM FLchessplayer: Perfect match to Fritz 12
Guavaguy: look how many pieces you were down
Guavaguy: you're kidding
NM FLchessplayer: Fritz his moves DUMBA**
Guavaguy: cry me a river that was a rudimentary win of a won position
NM FLchessplayer: stupid AH
Guavaguy: bandage your ego somewhere else
NM FLchessplayer: Eat ___ and die, jerk.
Guavaguy: I could beat you in that position LOL
Guavaguy: oh real mature
Guavaguy: you're an NM not a 6 year old
NM FLchessplayer: You are probably a cheater too.
Guavaguy: Ya ys
Guavaguy: ya ys
Guavaguy: you really are quite mature FL
NM FLchessplayer: If you defend him, it means you use an engine as well.
NM FLchessplayer: b;locked
NM FLchessplayer: loser
NM FLchessplayer: Eventually, my time will expire.
NM FLchessplayer: IF you really belive every 1200 beats a master, then you are an idiot and a liar too.