Nope ive done my homework on this , ive consulted my seo expert and this may slow down my sites pr but the traffic it will bring ill get on top 1,000's in alexa in no time
And the duplicate content part is not a worry either all data is under vbtags.com which has a dedicated ip all other domains are just parked there so all hits are dont by the ip or the domain vbtags.com
So in the end you will get more backlinks.
And its not duplicate content or else all advertising would be duplicated content people amke one image or a paragraph and get it posted on high traffic sites which gets them hits if im doing that under one domain and just giving the submissions a better change at seo then it wont screw it up it just might work out.