Sometimes hockey fans paint their faces. Some teams give out towels or pompoms to wave. That's about as docile as a fan can get while still rooting for their team. The Phoenix Coyotes' fans on occasion show solidarity by dressing all in white. A tradition started in Winnipeg before the team was hijacked south.
Football fans are by far the loudest and most obnoxious.
Some paint their faces, some their bodies. Football fans start by having an early party in the parking lot. The tailgate party is a staple of the football fans' rituals. It starts with drinking lots of beer and barbecuing next to their car. I have seen it.