Charlie Meyers' outdoors column in The Denver Post presents a classic Coase-ian situation. A roaming bison herd ignores fences and despoils the South Platte, a magnificent trout fishery.
I will forgive Mr. Meyers for missing the Coase theorem's application here. The extra-credit question: what is the problem preventing a solution? I turn that over the Law and Econ of the Information Age students.