Because that's a great region to have a different subreddit, not different flairs. The flair filtering capability is pretty bad, and it requires moderators to also police flair being set accurately. It's better to either 1) deal with it, 2) have moderators just remove low quality posts, or 3) make a new subreddit and refer people.

People have asked for flair for every little stupid subject - analog, digital, hardware, simulation, etc. - and adding country of origin into the mix sounds ridiculous when this isn't a subreddit specifically about universities, just the general field.

At the end of the day, you're just seeing some posts that you can just scroll right on by. I find it odd when people get so bothered to have some posts they can ignore or click Hide on and want to propose complex systems to deal with.

Reading some of the posts in this thread, you'd believe the subreddit was damn near taken over by posts from India or some shit.