At least they're citing some law

Orin Kerr, Prof. Althouse, various Cornerites and others too numerous to link are glomming onto the appearance of foreign precedents in Mr. Justice Kennedy's majority opinion (Mr. Justice Scalia is, too!). My possibly jaded thought is that at least they're following some law. But I wrote more seriously about this issue a year and a half ago (featuring the groanworthy opening line: "America wants no foreign rulers, explaining our reluctance to adopt the metric system"), and I can't think of what I might personally add to that. Read the links for thoughtful discussion on this admittedly important side issue.