a company (college) can not force a customer (student) to give-up his rights or privileges as a precondition of service
I'm skeptical of your claim for several reasons. 1) Courts routinely recognize that college is not a typical company-consumer organization, and they are often not treated as such. 2) Companies require you to waive rights and privileges all the time, and as a precondition of service. Want to buy a car? Arbitration and liability waiver. Want to hire a dentist? Medical waivers. etc. 3) Businesses routinely claim copyright/patent on products produced by employees (as a condition of employment) and such agreements are routinely supported in court. 4) Students do not pay the full cost of their education at just about any school, especially public ones. Their education is subsidized by taxpayers or endowment income or federal aid or whatever. That gives the college (or the state) the right to assert at least partial ownership of products resulting from a student's education. At my university, our system allows us to check for plagiarism without submitting the students' works to the database. I don't compel my students to submit their work to the database, but I do have them run it through the content check side.