Why go after all the little guys when you can shake down "Big Chain Restaurant" in one fell swoop?"
The Nannies already know from experience that "Big Chain Restaurant" caved to the smoking bans because they had the resources to hold out until the mom and pop businesses were ruined by them.
Competition gone, courtesy of the Nanny State.
The Nannies are going with the proven plan.
Maybe they'll pick up some money from "Big Chain Restaurant" in the meantime until full Big Brother compliance is realized.