That pattern is gingham not tartan but surely you cannot be serious ?
Brighton fans wearing the kilt - what sort of reaction do you think that would engender from 'rivals' (to give them the benefit of the doubt ?
Well almost 65 but don't yet consider myself to be a grumpy old m(f)an, others may disagree, so perhaps within your less than specific criteria, I am a grown man.
I don't consider your general rudeness does you any service, because whereas I may be happy to wear a replica shirt to games (only)...