What is the main idea of this passage?
The recording industry has gone too far in its fight against file-sharers in that Copyright Management Systems (CMS), used to enforce Copyright Management Information (CMI), can impinge on users ``fair use” of digital information. According to U.S. Code, Title 17, chapter 1, section 107, copying of copyrighted information is allowed “for purposes such as criticism, comment, news reporting, teaching (including multiple copies for classroom use), scholarship, or research”. Many proposed systems of copyright management, such as creating hardware with “anti-copying” devices already installed, can impinge on this fair use allotment in copyright law by preventing professionals with legitimate defense from exercising proper usages. It can also prevent the copying of non-copyrighted material by the average user. If a person wishes to make a copy of a noncopyrighted CD, so as to have a copy at home and one in the car, a copyright management system would prevent him or her from this fair use act.