A couple of seasons back I was walking up to the Theatre of Prawns for our game against them, and I saw a fella singing "If you all hate Scousers...". He was wearing a top with Rooney on the back. I was gonna point out the irony to him, but didn't have the time... From a simplistic view, you should sing at a game to encourage your team, or to piss off the other team's fans. Singing about Scousers and Liverpool does neither, unless you're playing them obviously.