Department of Unintended Consequences?

Researchers at the Highway Loss Data Institute compared rates of collision insurance claims in four states – California, Louisiana, Minnesota and Washington – before and after they enacted texting bans. Crash rates rose in three of the states after bans were enacted. The Highway Loss group theorizes that drivers try to evade police by lowering their phones when texting, increasing the risk by taking their eyes even further from the road and for a longer time.

The link is here and no I don't know what the controls are and how they adjusted for a possible time trend.