It is against academic ethics for college students to plagiarize papers, and they are usually severely punished. The specific punishment methods vary from school to country, but the following are some possible punishment measures:

1. Unqualified paper or zero score: If plagiarism is found, students are generally required to re-write a paper, or directly give unqualified or zero score evaluation.

2. Academic warning: The school may issue a formal academic warning to students to remind them to abide by academic ethics and record it.

3. Academic punishment: In some cases, students may be punished more severely, such as suspension of classes, detention on probation or withdrawal from school.

4. Impact on reputation: Students' plagiarism may affect their reputation and future career development.

In short, plagiarism is a very serious violation. Students should pay attention to academic integrity, abide by academic norms, and ensure the authenticity and credibility of their academic achievements.