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I suppose it is not unreasonable to assume some colleges wish to be as political-free and commercial-free as possible.
But if Columbia was truly open-minded, they would welcome all influencial speakers by balancing different points of view either at the same or alternate times.
For instance, let anti-war advocates open an un-recruiting office next to the designated recruiter space. If they run out of funds, they could always ask Air America for help.
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