How ‘bout them Cowboys?! As pre-season gets into full swing and America gears up for the upcoming football season, sports fans are prepping their barbecues and coolers for tailgating and partying to celebrate the country’s most popular sport.

Indeed, the end of summer is signaled by cooler weather, the start of football and the close of baseball, as it heads into the home stretch for the playoffs. Wherever your sports heart lies—be it with football, baseball, basketball or hockey—there’s a code of conduct when you’re supporting your favorite team at the next home game. In fact, there’s an unspoken rule for fans everywhere: Be passionate about your team, but not obnoxious.