A few years ago my mates and I set off from Lampeter to see Ebbw Vale v Aber in the League of Wales only to get nearly there and find the match off. Checking the fixture list we saw Swansea were playing Wycombe in the Freight Rover (or whatever it was called that year) so we drove over to the Vetch and sprinted out just in time for the game to start. It was about five minutes in before someone wandered over and, with genuine confusion, asked just who the blokes with broad English accents and black & green scarves were supporting.
I've only done the 'supporting the away team from the home end' a couple of times. It is very weird.