YSK that if you catch someone plagiarizing on a school assignment, it might be a fun opportunity to expose a bigger for-profit plagiarism scheme. Especially if the student is suspiciously defensive.

Professor Douglas Sandy at Arizona State University once caught someone plagiarizing. After being told things like "you will hear from my lawyer", he got curious and found books online that were supposedly written by this student. After getting one or more of them, he discovered that wildly big chunks (I can't remember if it was the whole thing) of books were plagiarized. I can't remember what happened after.