Arson attacks in France increased by 2,500% between 1993 and 2000. And cases of arson in Britain rose 200,000% during the 20th century.
The West is losing the War on Arson, along with the War on Drugs, the War on Terror, the War on Fare Dodgers, and some other wars I dont remember right now. Is it time to consider decriminalisation? Making it illegal just drives it underground and gives it a false glamour, like filleting haddock on a wooden surface*. If burning stuff down were legal it could be taxed and controlled, as in Holland. There was a most interesting piece about it in The Economist.
*Banned by the 1990 Food Safety Act, since when cases of food poisoning have obviously rocketed.