Go in with head up, knowing what to expect. This isn't a Blue Jays game. Leave your politeness and manners at home. Rude and crude. And that's OK because it's the CFL, it's expected that the crowd would be at that level. Aside from that, it's a great experience! Good football, good replays, great seats.
At the GO station later, security had to keep calming down a bunch of rowdies who had been allowed to purchase too much liquid refreshment. Worked out well - the rumour was that they got ushered off the train at one of the lesser stops.