Local leaders are urging caution in reacting to an online posting of a Ku Klux Klan rally for May 8 on the steps of the Rockdale County Courthouse.The event, described as an "anniversary celebration," was posted on the website of the Association of Georgia Klans, Knights of the Ku Klux Klan. It listed a march with a talk at the Rockdale County courthouse on illegal immigration and job loss, followed by a barbecue and meeting at the rally grounds and a cross lighting in the evening. Both Rockdale County and Conyers city officials said there had been no application for the posted rally as of