Salon writes, I don't have children, although someday I hope to, but I am a big fan of efficiency and changing from pajamas into pajamas. In other words, I am a fan of working from home, which is why I was dismayed to see that Yahoo's new-ish CEO, Marissa Mayer, has signed off on eliminating it as an option for her employees. This is about more than lifestyle or employee cohesion (or pajama pants). It's a deeply political move. All Things D's Kara Swisher, who first reported on the memo and its protest-too-much assertions that this is about "fun," also notes that the new policy doesn't just extend to a…