Wow, I think that is a fantastic idea.
Advanced services offered by data companies (and in my opinion, creepy) such as Lexus Nexus contain sophisticated algorithms for identifying probable friends and family via social media contacts.
So, as you stated, merge names derived from 501 membership (I would include several related Star Wars cosplay groups as well- maybe she angered an unhinged convention goer?) with the friends and family there of derived from Lexus Nexus with DMV records.
Seconds later, as you state.... the big brain computer delivers some interesting connections- at least ideally.
But wait, there could be more. Pay a modest fee for the IT programmers at Lexus Nexus to tweak their algorithims to find:
- People in Texas, Louisiana, Oklahoma -and-
- who are not on the list of known Star Wars cosplay group members,
- but.... show an interest in Star Wars cosplay from social media posts and contacts. These people would be independent cos players who are not in a formal group, but may well show up at conventions, meet ups etc.
Then feed in their names as well into the "friends and family" and "owns a black Nissan" connected data bases. Hopefully, interesting connections appear as well.