Funny usenet story. There was a long thread about seat belts. Of course lots of people were upset that the US was then writing laws mandating their use. One day, I took one of their posts and did a find/replace from "seat belt" to "headlight" and then made a tweak or so. One sincere-sounding kid from Bell Labs (yep it was a while ago) answered me with good arguments (of course). That reinforced my growing realization that people are unable to detect irony or humor on the internets.