It's a natural occurrence. When enough ill-mannered people find their comic-book knowledge corrected by someone they don't like, their only recourse is personal insults. Helpful hint: in the most amazing coincidence, pointing out where I'm wrong is almost always: they didn't understand what I wrote. Find my comments on Barton's hemi rockers. AFAIK not one person saw what I pointed out: Barton's geo is not perfect, the question was "is it enough to be important"? [carrier wave]