By all accounts, the citizens of Green Bay, Wisconsin, celebrated the Packers’ Super Bowl victory by flooding out of their houses to embrace each other in jubilation. Also by honking their horns. And by flocking to Lambeau Field with snow shovels to dig out the stadium in preparation for a big welcome home to the team.But the fans didn’t overturn cars, set fires, fight each other, or smash store windows. What’s with that? Don’t they know how cities are supposed to celebrate?