Nothing seems to anger the modern environmentalist more than an empty plastic water bottle. You’d think our otherwise empty landfills were overflowing with Poland Spring and Dasani litter, and you might as well strangle a sea turtle with your bare hands as open an Aquafina. Last week, Phillips Exeter Academy joined the anti-bottled water movement, blocking its sale on campus. Exeter joins Harvard, the University of Vermont and growing list of other cloistered campuses in taking a symbolic stand against a product that more than half of all Americans buy.