By Lawrence Hurley WASHINGTON, April 1 (Reuters) - Protesters disrupted U.S. Supreme Court proceedings for the third time in just over a year on Wednesday, with several shouting denunciations of campaign finance rulings before the nine justices heard oral arguments in a bankruptcy case. Five protesters were later charged with violating a law that outlaws "loud, threatening or abusive language" in the Supreme Court building, according to court spokeswoman Kathy Arberg.