Actually, the term "evomaniacs" refers not to true scientists, but rather to the self-educated, cult-like followers of "evomania".
Hey, that's pretty good--evo-freaks with evomania. How to diagnose? Just read back in posting history and look at these poor sad sacks, who go through elections, through wars, through political turmoil---and never comment on anything but evolution here on FR!
Maybe there should be an entry on Wikipedia for evomania, on their Asberger's Syndrome info page.