Answer?
No, not only 13 year olds play the game.
Story from chris_nin00?...
Yes
Gather around young ones, middle aged ones, and undisclosed ones. Gather around!
Now this tale I'm about to tell you guys is a true story with a moral attached to it. See if you can figure it out.
So sit back, grab a snack, listen to the wondrous story telling of chris_nin00
*Story time*
Once upon a time, there was a boy named chris_nin00. People called him Chris because they don't want to call him a 'ninny' or a 00 agent. He thought very highly of himself and always strived for perfection. Today however he wanted to beat a kid up. Yes, you read right. He wanted to beat a kid up. He was so happy walking along the sidewalk of the park. You want to know why kids?
*You nod your head furiously while someone in the back screams, "eeee-YEA--UH!"*
His 14th birthday had just passed and he got lots of good and fun things from friends and family. He got underwear, boxers, movies, and games, big model toy sets and a remote controlled plane. But he can recall, his most favorite gift of all!!!
Chris breaks in to song...
"Yu-gi-oh! I'm gonna master the cards
Gonna use the heart of the cards..."
On and on he went singing. Until...
"I'll challenge you pipsqueak!" squeals a 9-year-old looking boy, "Yu-gi-oh! Right here right now!"
"It was one of my little brother's friends," thought Chris, "Now's my chance to beat someone up easily... with my Yu-Gi-Oh cards!"
Chris thought this was going to be easy. Think again Chris. Think again.
"I'll start off by summoning, BLUE-EYES-WHITE-DRAGON!!!" Yells the boy.
Blue light flashed everywhere, a roar was heard, and soon Chris was on the ground shocked.
A big dragon stood in front of Chris.
"Your move," says the boy, forebodingly.
Chris gets back up and brushes the dust off. "I can handle this," Chris says to himself, "He's just a little boy"
*Battle scene*
Blah
*End Battle Scene*
The 9 year old screams with delight as he takes Chris's Dark Magician Card.
"See you later sucker!" smirks the boy as he walks away.
The shock on Chris is immense.
"I think there is a moral to this," says Chris, "... I don't get it"...
*End Story time*
Did you kids like my story telling?
The moral of the story is...
I think you are smart enough to infere from it my young ones.

Hint: The Guild leader was Chris!

Not me, but Chris in the story!
I hope that lightens up a few things.