If I played more away matches then I think I most probably always would take a jacket and tie with me - whether required or not. It's nice to be smartly dressed in jacket and tie and (especially when not required) shows a certain respect to the hosting club.
If I keep applying that logic, why not wear it at your home club? Do you not respect there?
There is a flippancy to my comment but it gets to the hub of this whole issue. Certain people believe it is showing respect. The rest of us don't link J & T with respect at all. I show respect by being polite to people, far more important than wearing a jacket, although I have no doubt you are also polite so please do not take that as a slight :thup: