UPDATE: According to this article, a Facebook representative states that they are not taking action at this time but are working on improving their flagging system.
It appears many players are getting the following warning message when they log into Facebook. Most Mafia Wars players have more than one account and this is kind of scary. I’m not sure what ignoring the message does but there is a risk that you could lose all of your accounts. I would think twice before spending any money on an alternate account and hopefully Zynga will put a system in place to retrieve your main Mafia Wars account in the event that it is shut down.
I checked out this Facebook Question Page and it seems that people living in households where more than one family member uses the same computer are also getting this message. I doubt that Facebook would want to remove legitimate and real users. Hopefully they will do something to correct the issue or Mafia Wars may lose even more players! Of the 380,000 reported daily users, I’m almost 100% sure that 30-40% of these are alternate accounts. How low will Zynga allow these numbers to get before they shut down further development? Facebook isn’t helping the issue.
Thanks to Andy Dubko and Mira Stoimenova for posting their warnings on our fan page. I will update you if I can find more information.