It's not bad 'net etiquette. He sent the message four years ago, and it only recently arrived. (See his first sentence) We will need to wait until 2012 for his response now. (The world ends in that year, unfortunately. So likely the boosted transmission will rend Earth asunder.
Oh yes, this topic that started a debate between Lonestar and me for over a couple years.
Unfortunately, in the end, Lonestar's argument about aliens (Which he claimed was based on "many years" of study) was mostly quotations of the Bible and how he believed aliens were demonic hallucinations. (I am not lying...) While also stating alien life was impossible due to a large number of improbabilities that only had to do with human life.
Though I suppose any life beyond human life is truly impossible if you buy into Creationism. Although it still strikes me as weird that a book written thousands of years ago, and then translated and re-translated into different languages, could be used for a scientific debate.