They left with aurors, and then the ministry fell a few weeks later.. Were those aurors affected? Would big V know where they were? If JKR wanted the sense of loss to truely permeate this book, she should have shown Voldemort interogating them, and let Harry see that like he saw everything else Voldemort was doing. I, and many other Dursley haters would LOVE to have read that chapter... I can only hope that someway, somehow, Uncle Vernon eventually felt the cruciatis..