The government absolutely has no business telling people what grocery bags to use.
On the stopped clock principle though, there are many good qualities to re-usable bags. Especially if you shop at discount stores that don't offer bags, farm stands, and farmers' markets. They're stronger and they hold more. I HATE it when the bagger sticks one canteloupe in a bag for fear of it breaking or because it won't hold more.
Even left-libs can't be wrong about everything.
But its only common sense to toss them in the wash with the other kitchen laundry.