Frankly, I don't see a problem with this if it is done consciously rather than automatically. *<p>Usually, I'm interested in currency not recency. If, say, a technical article was written in 2015, I don't exactly care that it was <i>written</i> in 2015 but do care very much whether it's outdated today or not. APIs change, etc. If the blogger has re-dated the article, that suggests they believe it is still current, which is useful information to me.<p>(* - Caveat: no, I've never redated a blog article myself. But I am only a very infrequent blogger anyway.)