I recently discovered an anomaly during Facebook login, if it can be called an “anomaly”. If a user logs in on a facebook application, his access token can be used by someone else to make graph API calls.
I thus experienced with it and created http://www.mauritius-news.xyz as well as http://www.britnews.info ( Same template but different sources for the feeds )
I have set a list of Facebook pages whose feeds are retrieved and used the same algorithm as Postexplorer.com to re-arrange the feeds.
Do check them out!