Builders demonstrate leadership with call for regional planning Under attack from politicians, environmentalists, and irate citizens, Cape Cod builders and developers are circling the wagons and firing back — with some eyeopening proposals. After 15 years of rapid development, growth has become a political hot potato in this easternmost region of Massachusetts — long favored for its sweeping beaches and seaside charm. From 1975 to 1985, Barnstable County, which encompasses most of the Cape, was the fastest growing county in all of New England. While the boom in residential and commercial building spurred the local economy and brought prosperity to builders, it also contributed to the Cape's growing list of problems and inflamed local opposition to further development. Last May, former U.S. Senator Paul Tsongas jolted the