In SA, unless you've openly pledged allegiance to Port Adelaide, you're generally a crows supporter by virtue of the fact you shop at Foodland, eat Golden North Ice Cream, and believe the Popeye is a more iconic water travelling people conveyance than the Manly Ferry.
When I moved to Melbourne and told people I came from Adelaide everyone assumed that I supported the Crows. It must be a product of being in the law. I must have come from a 'good' suburb and gone to the right school and thus must support the corporation.
Needless to say, anyone assuming that was quickly and forcefully disabused of the notion.