The graffiti artists are no less swift. There is no privacy in the publicity war. But the most productive parts of the PR machine are the rock-throwers and petrol bombers in the riot zones on the West Bank and Gaza. Although there are many occasions when these battles are genuinely out of control, they are also at times made for TV and newspaper front pages. Masked rioters strut a few yards in front of a scrum of helmeted photographers, stars in a piece of theatre that seems totally staged until, of course, someone gets shot.
Every editor knows such images are irresistible.