But... given an adversary's policy of "we will provide this data if and only if it goes unused", there's no reason to give that policy any weight in deciding whether to use the data. If you decide to use it, the policy will kick in and you can't. If you decide not to use it, it's not relevant that it remains technically "available" for other people to also not use. That's not a reason to consider what Yale wants, it's a reason to slam them for being weasels.
An example where this has happened: Some (many?) U.S. public libraries have stopped storing historic checkout data for patrons, in order to avoid having to turn the data over to a govt. agency. I recall being able to get a list of every book I had ever checked out. Not any more.
http://www.ratemyprofessors.com/SelectTeacher.jsp?the_dept=A...
The advantage of having the data come from Yale is that they can mandate that every faculty member must take class time to conduct the student evaluation. This ensures that [nearly] every student's experience in every class will be considered in the final results, which gives much more legitimacy to the results.
When I taught a college course several years ago, it was conventional wisdom that student evaluations were primarily driven by grades, thus encouraging grade inflation. A popular website called "rate my professors" included ratings for "easyness" and "hotness."
Female teachers were advised to anticipate receiving one or two rape threats in each batch of anonymous comments.
Yale can decide how the information is used. But if someone within the Yale community comes up with a Yale-beneficial use for the information, Yale should embrace that use.
I don't think this was a free-speech issue, so much as a missing-the-boat issue. Yale should be nurturing its hackers. Yale has an excellent CS program (I say this as a Yale alumnus), but in recent decades, it's not been much of a countercultural or hackerish place to be. Yale is top-notch at producing lawyers and investment bankers. It needs to get better at producing hackers. (By many recent accounts, it's starting to get considerably better. Maybe this episode will inspire a rethinking of sorts.)
To collect this data, Yale hands out surveys and students generate the content.
Yale needs the students to gather this data but the students do not need Yale. They could just as easily aggregate this data on an external website. It seems that they even have the ability to auth against Yale servers.
This content is generated by students and is supposed to be used to improve the University for the students. If Yale doesnt trust its own students with their own data it opens up the question of what the relationship between Yale and its students is and whether Yale is the kind of place for kids who understand how technology is shaping democracy, privacy, and our culture in general.
I'm not sure what the policy implication is - there's no easy rule here. But it's worthwhile to keep in mind that "information wants to be free, Yale can't decide how it's used" (an attitude that's a bit of a straw-man, but not too far from what some have argued here) ignores the reality that the next time the Yale faculty debate whether or not to collect and collate evaluations (or whether to have a numeric score component), they may well decide not to. (Which, of course, is a principle that applies to other cases of data collection - sometimes it's best not to collect it, just because you don't know how it'll be [mis-]used...)