It takes courage and tremendous power of persuasion to convince the electorate, and the powers-that-be, that the general consensus on a matter of public policy is wrong. Kevin McAllister and Mike Bottini showed that courage when they filed a lawsuit last week to try to stop the construction by the Army Corps of Engineers of a 3,100-foot-long and 50-foot-wide revetment along the ocean beach at Montauk. I’m not so sure about their powers of persuasion.