The Wonderful, Terrible, Terrible Towel Trouble

Katie and Bobby are dating and are both fans of Pittsburgh Steelers football. Katie says she was born into the Steelers Nation, while Bobby came to fandom while dating Katie. Their issue is the treatment of the team's signature "Terrible Towel". Katie says it should be treated with the utmost respect as an emblem of the team; Bobby says once it's purchased, you can do with it what you please, whether that's wiping chairs or your feet. Who is right, and who is wrong? Only one man can decide.