And they haven't already?

Riots in France: Day 11.

"If we don't take the appropriate measures right away, things could get way out of proportion," said Stephane Ribou, a police spokesman in Rennes. Ribou said the city of 200,000 had one of the lowest delinquency rates in the country. On Saturday night, roving groups of young men set 18 cars and 40 garbage bins ablaze there, he said.