Last week I noted that anti-drug activists in Maine had asked Portland's transit agency to reject bus ads supporting a ballot measure that would repeal local penalties for possessing small amounts of marijuana. Such viewpoint-based censorship in a "designated public forum" would have been clearly unconstitutional. But at least no one said advocates of marijuana legalization should be arrested. No one, that is, except Ruben Santiago, interim police chief of Columbia, South Carolina's capital. Popehat's Ken White reports that Santiago recently cited a resident's criticism of marijuana prohibition as grounds for a criminal investigation.