Acorn has filed a lawsuit again the filmmakers that posed as a pimp and prostitute and travelled to various ACORN offices, asking for tax form advice. I first heard about the latest Acorn scandal last week. But I hadn’t seen video footage until today. It’s priceless. Acorn, which calls itself the “nation’s largest grassroots community organization of low- and moderate-income people,” also runs housing counseling offices for homebuyers around the country.