I regret that I can not remember exactly where I saw this word first used, but I fully intend to propagate it and do my part to see it added to the English lexicon. It was used in reference to the kinds of people who raise heck in internet discussions when, in fact, they are spouting non-facts and unnecessary controversy that could easily be avoided by spending three minutes studying the truth.

unbrained

Used in a sentence:
How is it that well into the 21st century, unbrained individuals still believe that forwarding an email message, especially one with so many misspellings and grammatical faux pas, will result in Bill Gates sending them money.