Rosalind - 9:07 am on Jun 14, 2012 (gmt 0)
I always spellcheck before making blog posts, and more often than not end up with leaving several red underlines because they're correct. Sometimes they're new words, or proper names that don't get recognised, or the dictionary used simply isn't big enough. So checking for spelling and grammar is going to use a whole lot of processing power. But what you'll get is the people with the widest vocabularies penalised along with those who can't spell if it's used in the algorithm.