What y'all are missing is that this combines competitive eating with tag. How many hot dogs can you scarf down while running away from ghosts? If you manage to eat the whole personal watermelon, you can tag ghosts for the next minute! After clearing the first board, the hotdogs are replaced with deep-fried haggis nuggets!
2). It already exists: http://www.pacmanhattan.com/ and has for a few years, now.