Dueling Network is full of all kinds of weirdos.
One guy A.S.S.'s me for explaining that Continuous Spells like Card Trader can't be played during the Standby Phase.
And another forfeits when I tell him that my Effect Veiler won't destroy his Black Rose Dragon after negating it's effect.
A third kept trying to destroy my Ally of Justice Catastor by attacking it first with his Blue-Eyes White Dragon and then his Exploder Dragon. I had to correct him twice. He offered a draw (he technically had more Life Points), but I politely declined. I turn the game around later and win.
Then there's the guy who offered a duel with the note: "Easy win." I needed to test out a new deck so I accepted his offer. However, during the game he kept making misplay, after misplay, until I realized he was blatantly cheating. After taking a deep breath I spent the next fifteen minutes explaining game mechanics to him. After seeing that his trolling attempts left me unfazed, he quit, leaving me with the win.
While I won most of my other games fair and square, that one A.S.S. still bothers me. Fortunately this is the first time it's happened to me so I shouldn't have to worry about any up and coming bans...hopefully.
Remember players, the game ends with you.