There's always that one freshman
That one who sings in the shower. Maybe they forgot the Rules or maybe they think that running water will keep them safe.
The ones that sing old lullabies and folk songs are usually Taken, but those who sing hymns or country are always left alone.
Sometimes, if the singer is returned, they continue their shower serenades, but with the ability to sing duets by themselves, or they sing in an unknown language that makes you want to sing along. Those that do end up biting off their tongues.