Oakland is a dump, but it has the rowdiest fans who somehow manage to be crazy and rowdy without being belligerent. The team seems to acknowledge that they are playing in a dump, though, and have done a really good job with the beer selection and pricing, as well as the food truck "plaza" (basically a gated-off parking lot where a small army of food trucks park for each game, so fans can walk out to the parking lot and get a burrito or whatever, then walk right back to the concourse), so at least if you're going to a crappy stadium, you'll get some really good beer and food for fairly reasonable prices.