Itseään ruokkiva mellakka

Ajankohtaiskommenttina tämä on mielenkiintoinen:

Accurate predictions of riots are few and far between, but everyone has an opinion on what causes them once they have got started. In fact, the proximate causes of disorder can rarely be determined with any degree of certainty. They emerge almost out of nowhere. But they can spread like wild fires once they have been triggered. Cyclically, an outbreak of aggression makes potential offenders realise they are unlikely, as individuals, to get caught while the police are swamped. So they join in the looting and vandalism – thus making yet more potential offenders confident enough to have a go. Frighteningly, given the right context, a riot can almost become its own cause.

Tämä ei tietenkään tarkoita sitä etteikö mellakoilla olisi taustatekijöitä, kirjoittaja listaa niitä pitkältäkin.