Over on Mark Maynard's page, a discussion of the proposed pedestrian malling of College Place seems to have veered into a critique of on-campus businesses, with the complaint that they don't pay property taxes. The larger issue that I see with housing bookstores and restaurants on-campus - and this holds true across most super-block campuses I've spent time on - is that providing these services on-site helps to emphasize the town/gown dividing line.