Just had to post this great explanation on why Rider fans are so despised around the league. Credit goes to "jcalhoun", whoever he is:
The problem with the Riders' fan base is they were told for years that they were the greatest fans in the league and this was the consolation prize for being the lovable losers of the CFL. What the rest of the league admired was their fan's stoicism in the face of one horrific season after another. But as the team turned around and started winning with regularity, this consolation prize became a cri de coeur enabling the worst sort of excesses amongst the fan base. When I think of the best fans in the league I think of someone who's there rain or shine, thick or thin; I don't think of a drunk painted green with a watermelon on his head who has left Saskatchewan and only recalls his passion for the game when the Riders come to town.
There are (of course) wonderful people cheering for teams across this league and the Riders have many of them. But in my experience they also have a healthy share of the worst fans in the league. And the latter group is why the rest of the league is smirking right now, over the team's flagrant cheating and woeful win-loss record.