Alan Rubel and Mei Zhang have published "Four Facets of Privacy and Intellectual Freedom in Licensing Contracts for Electronic Journals" in College & Research Libraries.
Here's an excerpt:
This is a study of the treatment of library patron privacy in licenses for electronic journals in academic libraries. We begin by distinguishing four facets of privacy and intellectual freedom based on the LIS and philosophical literature. Next, we perform a content analysis of 42 license agreements for electronic journals, focusing on terms for enforcing authorized use and collection and sharing of user data. We compare our findings to model licenses, to recommendations proposed in a recent treatise on licenses, and to our account of the four facets of intellectual freedom. We find important conflicts with each.