Washington Post: Environmental activists held a hoax press conference Monday morning, pretending to be the business group — and pretending to announce that the chamber was dropping its opposition to climate-change legislation now in Congress. The event, complete with fake handouts on chamber letterhead, at least a couple of fake reporters, and a podium adorned with the chamber logo, broke up when a spokesman from the real chamber burst in. What followed was a spectacle not usually seen in the …