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From the Model Mayhem FAQ:

How do I make sure Google DOES NOT list my MM account when someone searches on my real name?
Though we do not control Google (no matter what anyone tells you), if you do not want Google to associate your MM account with your real name, then by all means use a pseudonym (fake name). If your real name is no where on your profile or your portfolio, it is very unlikely that Google will ever make the connection.

While we cannot guarantee this will work, this link may help to remove changed content from Google search results:

Additionally MM offers a few options for Privacy Settings. Click My Stuff then Settings to review them.