Fuck this guy. And I don't mean get him laid, either.
Seriously, what anal-retentive assshole would lean over a company's shoulder and say, "Hey, whatcha makin'? Oh, you say it's a medieval fantasy realm with multiple players at once? Oh, ouch. You see, a while ago, I made a game where lost of people could play online at once, too. Mind you, it was about something completely different, but still, you stole my idea of of online multiplayer, so you owe me a ton of money. I'd prefer it in cash, please," with a straight face? Christ, you don't see H.P. Love craft popping out of his grave, walking up to Stephen King, and saying to him, "Hey, asshole, you stole the concept of horror from me! Where the fuck's my money, punk!?"
Now do you?
Fuck, if those guys in Texas let Worlds.com get away with this, I suggest we KICK TEXAS OUT OF THE UNITED STATES. Seriously, this case is grade-a, depleted uranium BULLSHIT.
Watch yer figgins.