1) In terms of duplicate names, the product also helps you optimize for specific relevant terms like "Patrick Ambron, developer" or "Patrick Ambron, BrandYourself" "patrick ambron, NYC" etc. So people looking for you will be able to find you. That said, if two people are competing for the first page of Patrick Ambron using our service, the person more actively updating and creating content will edge the other out (google loves new, relevant content). But, at least they'll be a leg up on all the other Patrick Ambron's of the world
2) This is definately a possibility--in the same way, I can go and create a wordpress site using your name. It's hard to detect, but there are warning flags we look for. If you create an account for Patrick Ambron, but don't have the authentication for any of the other profiles (FB, twitter, LI) it looks suspicious and we check it out. We also have a policy where if you email us because somebody is using your information in an account, we will suspend the account for you, until the user can verify that they are who they say they are.