That was our first thought as well!! Unfortunately FB no longer allows you to fetch the full friends list - you can only get a list of friends who have also authorized the app.

Re: scraping location info, we thought it'd be best to let people put in their workplace since the information on FB is typically out of date, missing, or difficult to structure. It's worked really well - the list of companies is really clean right now!

Great question :)

scraping is dirty, this is a much more legitimate approach