I think the point about American Football (sorry, EX-American Football!) is that, as was already said, your guys have to don body armour to play it whereas rugby and GAA (Irish soccer/rugby/play whatever the hell you like just score) use no such protection. So send your American best over but leave the armour behind and see how they do, huh?
Incidentally, does this mean HM will be re-re-re-re-invading Ireland? Couldn't do a worse job running it than our lot, and the Proddys would all cream themselves!
Excellent thread: already on my nominations list for next year!