Is Dave Winer also concerned with how
Radio Userland does not spit out valid HTML, or how
his own weblog <a href="http://validator.w3.org/check?uri=http%3A%2F%2Fwww.scripting.com%2F&charset=%28detect+automatically%29&doctype=Inline">does not pass W3C validation</a>? It seems a little hypocritical to me.
As long as there are people who will refuse to adhere to specifications like HTML or RSS, there will be aggregators who don't care ... not because they are sloppy but because, if they cared, people would not use them. Would IE be such a popular product if it only displayed <em>valid</em> HTML pages?