I'm not going to claim to be an expert in the area of parenting. I can't even really claim to know anything about children. But I do know what I'd do if I opened my mail and found out that the Recording Industry Association of America was suing me over my stepdaughter's downloaded music collection. I'd freak out (as would Mr. Tasha). Luckily for music lovers - and parents - everywhere, Debbie Foster, an Oklahoma mother, didn't freak out, and she didn't back down.On Feb. 6, 2007, a U.S. District Court in Oklahoma ruled that Foster, who was sued for …