re: What exactly is a sidewalk fan?

I don't care much about the sidewalk fan designation. I attended Arkansas, but most of my friends from back home did not. Most of them are Arkansas fans anyway.

Most "sidewalk fans" have close relatives or friends who attended the school. There are a few exceptions, and rather than sidewalk fans, I call those "t-shirt fans". They tend to find a winning program and latch onto it because they're losers.