Do we really need to have someone complain about xkcd being submitted every time it is submitted? If you think it is that bad, flag it, don't complain in the thread.
Guess it does happens with a lot of articles, but the good thing is only the good ones float up - all of PG, joelonsoftware, mattmaroon, techcrunch, avc posts etc. These are things we would anyway checkout if HN did not exist.
I would actually be happy to be assured that all posts from these sites get submitted, hence getting a chance to get upvoted.