A pair of gay activists are raising the stakes in the fight over same-sex marriage, vowing to post on the Internet the name and address of anyone who signs a petition to ban gay marriage and civil unions in Massachusetts. "I have the fight in me now, and if people I know, or that I support, or that I do business with are on that list, I might not support them or their philanthropies or their businesses,'' said Tom Lang, who launched knowthyneighbor.org with his spouse, Alex Westerhoff. Lang, 42, said he and Westerhoff, 36, are only providing via the...