By Tobias Carroll What do you do when you own a massive boat but you can’t bring it in to a port for fear that it will be seized by governmental officials? That’s the dilemma facing a number of Russian oligarchs who have used some of their wealth to buy absurdly large boats. Earlier this month, Italian authorities seized a pair of yachts belonging to oligarchs, and others are likely to follow. Following the efforts of law enforcement to track down these vessels has become a kind of spectator sport — the Twitter account @RussiaYachts, which traces their comings and goings, has over 28,000 follo…