Not sure about the SEO...I guess if others are sharing your content maybe it would help. On the other hand if I went to a site and it had 12,000 likes my first reaction would probably be "spammy". My second reaction would be I wonder how much he paid for those likes. If others can see all your fans in Croatia with a different language theymight think the same thing. I guess it depends on your service area and market. 
If fake accounts are being used I am sure eventually the gig will eventually be up!
Boo