You've just caused the doom of the world by joining KMC
By doing that, everyone's like "oh, he just joined KMC! KMC must be awesome!" So then they all join KMC.
Because everyone is on KMC, no one goes to google or yahoo or any other website so they all run out of money and shut down.
Then, since everyone is so focused on KMC they all fail school/college/get fired from work.
meanwhile, the other website owners are like "darn, we're out of money!" So than they decide to hack into KMC and shut it down.
Now that KMC is gone, everyone is out of money (because they have no jobs) and turn to a life of crime. Then when the government is distracted getting rid of crime the ALIENS INVADE AND WE ALL DIE!!!
Sorry if that was too random, or if is was "spam" (but everything in the off topic forum is, right?)
And sorry if that wasn't funny enough.