I like the way ocd made a list of the delegators. I am missing out on the website name though, but it has the list of all delegators and and the amount of delegation against their name. you can think upon using that list to build on it something that make the identification as well as the scheme of 1vote 1 account 1delegator, or something upon the delegation pattern.
People could just delegate with multiple accounts they own, that doesn't really do anything about the subject of this post.