Although the suggested letter contains some good points, I'm frankly puzzled by what is meant by the term "Technical Prevention Measures" and what the CLA means by:
New copyright legislation should punish copyright-infringing behaviour, but should prohibit the circumvention of technological prevention measures for legal purposes.HK
PS - the site now says:
Prohibitions against the circumvention of digital locks should be limited to acts of copyright infringement, but should not prohibit the circumvention of technological prevention measures for legal purposes.
This makes more sense, but I still don't know what is meant by technical "prevention" [sic?] measures.
Another suggestion would be to update the CLA's copyright infromation page
which includes some obsolete and less than useful references, and does not include such useful material as Laura Murray's and Sam Trosow's excellent book, which is the best single source book on copyright for librarians at the present time.