This is...probably rooting from all the drama that happened in the fandom, but without talking about that, there's a user posting journals in the Mixels Fan Club saying he "hacked" users and posting outright usernames and passwords. I wasn't sure if this was a real threat or not so I tested one of them and it WORKED. (people later vandalized that guy's profile and stuff)
CHANGE YOUR PASSWORD. I CARE ABOUT YOU ALL AND DO NOT WANT ANYTHING TO HAPPEN TO YOU.