I mean, my dad also put rice into the broth once he finished the noodles so, not the worst atrocity... yet.

Technically speaking, using the ramen broth to eat rice is normal in japan (and other asian countries).
Usually, you can order a side of rice in ramen shop, which is precisely for this purpose. Not to mention there's also custom of using udon/rice to cook with the leftover soup after a round of sukiyaki.

DammitCarl said:
I mean, my dad also put rice into the broth once he finished the noodles so, not the worst atrocity... yet.

It's because of Shu's reaction, she's a rice purist.