From my reading, there were multiple efforts in play -- he was 'infiltrating' Anonymous with multiple personas, and (if my reading is correct) trying to correlate that information with Facebook data.
Otherwise, none of it really makes sense. You can't investigate the friends of somebody on Facebook without knowing WHO the somebody you're investigating is. So, he had to at least have ideas for leads for people to start stalking.
I think we can all agree that correlating random activities across all Facebook users (whose profiles are public, which is of course another catch) would be really close to impossible with one reluctant developer and an 'analyst'.