Further to that article, it's interesting to note that this week the Army announced the formation of a unit specifically designed to take the war to social media.
http://www.theguardian.com/uk-news/2015/jan/31/british-army-facebook-warriors-77th-brigade
Presumably this unit would undertake...
For anybody interested in a seriously informed opinion of how to combat ISIS, here's an excellent article from a leading expert in the field.
http://smallwarsjournal.com/jrnl/art/unmasking-the-executioner-what-this-gesture-means-and-how-it-can-help-in-the-fight-against-
A précis of her...