There may not be a scientific way to prove it but I truly believe that the fans of the Cleveland Browns are the greatest in all American sports. I have very little international experience to speak of what other fans are like but there is no team that I know that has suffered so much losing and so many problems while still having a fanbase barking year after year.
Browns fans are why sites like Dawgs By Nature exist. To be honest, Browns sports coverage is some of the most diverse and detailed oriented throughout the internet because of the great fanbase that reads, watches and listens to anything related to their team.