About four and a half decades ago, the student government at a major, prestigious private university in a major metropolitan area pressured the university administration to disarm the campus police. This was put forth as a "liberal" move some time after the assassination of President Kennedy.
The decision was very well publicized in print.
Shortly afterwards (surprise, surprise, surprise!), there was a significant increase in the number of rapes, muggings, purse snatchings, and other assaults on campus. It was safer to walk several blocks from the campus than on campus at night. The University asked the surrounding city for help, but help couldn't be provided for some reason. The decision was soon reversed.
Why more people did not foresee the problem in advance is not clear, but it made a profound impression on me and on my confidence in the collective judgement of the so called intelligentsia.