The possibility of this happening is extremely remote, given the legal rammifications that would ensue.

That doesn't matter much. The _perception_ of people is more important. For everything people do, they balance the benefits against the drawbacks (often without really being aware of it). The (perceived) benefit of a student to fill out the survey is small. The perceived drawback (they can trace you and god knows do what) for some of them is big. So, they simple don't do it.

Flying is safer than driving. Yet there are many people who will never fly, because they are afraid, and have no problem driving 80 miles/day. In their perception flying is unsafe, so they will not do it.

Abigail