And this person is real. She's Hilary Carlip, a performance artist whose latest project is reconstructing real people's characters solely based on gleaning the shopping lists they've left behind - and the results of one such subject are pretty surprising.
http://www.npr.org/blogs/daydreaming/2008/...icdetect_1.html
Very Shawn Spencerian. And that would be a interesting ep idea, I think - Shawn being involved in the case where no other clues exist besides a grocery list...
Anyway, check this out.