i think you will find that other football club supporters will be attending so if its hooligans you're talking about then its a day of peace and all other issues put to one side
I think he refers to the site that gafferknowsbest linked to, which has the following line on it:
THIS IS A HOOLIGAN FORUM FOR ANYONE INTERESTED IN THE HOOLIGAN SCENE
As pointed out - hooligans and 'the hooligan scene' are not typically associated with families. At least not my family anyway.