Emoji are wonderful in that they have been embraced across cultures and languages — albeit with different interpretations. People in Uruguay, Malaysia, New Zealand, Thailand, Pakistan and Nigeria all get to see more or less the same symbols and could conceivably communicate solely over emoji, which honestly sounds like a great party game.
The ability to fly the flag of your county, territory, province, region, etc. is a great option. It reinforces the international — nay, global — nature of emoji.
The only issue here is that vendors will have to support like 5 million custom images, so there might be some issues across systems and platforms. Hopefully we’ll work it out.
(I think that Scotland flag is going to get a workout this next year or two, in particular.)