The reason is easy. The Vikings have tangles with the Pack for the division pretty much every year since 1990. The Bears have only had one or two good years in that time.
My Packer fanship predates Favre, but it's still dates to the 90s.
As for the sleep aids, I don't sleep.
But, I never condone cheating in an online setting. It is one thing to alter your own game experience, but in cheating online you are altering others' game experience without their consent.