Protesters

You may wonder why an American columnist would want to talk about the proper technique of burning cars, but that's exactly what Slate's Daniel Engber did in an article entitled, So, You Wanna Torch a Peugot? Forget the al Qaeda training videos and CD-ROMs. If you want to know how to cause mayhem, one need only to turn to Slate.A cigarette butt probably won't set off a blaze by itself, but a…