If I remember correctly they had IP to Tgt maps drawn up for his house, the best mans house, and both sets of parents.
Even easier now. Chap I know lectures to all sorts of people - in and out of uniform - on cyber warfare/security and similar.
One of his party tricks is during the presentation, gets an assistant "backstage" to do the 192/facebook/linkedin/electoral roll stuff and then - thanks Google street view - ends presentation with pictures of audience members' houses!!
On average takes less than half-an-hour ....
Concentrates the mind does that ...........