The issue that I raise here is that it becomes increasingly frequent to see w3Fools posted as a link in response to questions and answers. This ad hominem-style attack is often the only content of a post, usually in comments, as if to say "You linked to w3Schools, therefor your entire answer/question is invalid or incorrect."
I see two significant issues with this, both in terms of attitude/community spirit and in terms of participating in the perpetuation of misinformation without understanding.
As it relates to attitude, when users are trying to help or trying to seek information, it is deleterious to have their efforts rebuffed on the premise that the reference source they use is so polluted as to render their entire contribution irrelevant. This is not the appropriate venue to explore the validity of the criticisms raised on w3Fools, but it does suffice to say that w3Schools, your mom's blog, or a random forum could all contain information that answers a question, raises a question, or adds a viewpoint to either. If information is patently false, it is false, regardless of the source. If, however, the information is relevant and accurate, does it matter where it comes from? By touting w3Fools as an automatic invalidation of a question or answer, we create an elitist and hostile environment in which a user is judged simply on where they got their information. This is not conducive to community, and it is not conducive to the purpose of the site.
Secondly on perpetuation of misinformation, whenever a more experienced developer blasts another less-experienced developer with the w3Fools link and a downvote based solely on the source of an answer's information, the less experienced developer either turns away from the site in frustration (bad), or worse starts to post w3Fools everywhere he or she sees w3Schools referred to. The vicious cycle feeds itself, and now we have troves of newbie developers swearing that any reference to w3Schools is blaspheme when they don't even understand the criticisms raised against it. They turn out to be even more zealous than the experienced developers, and now we have a w3Schools witch hunt on our hands. Stackoverflow is now a major source for the propagation of the idea that w3Schools is a horrible place, we are training a whole crop of developers to blindly hate a particular website without cause or understanding of why.
w3Schools, like any other site, is a potential source of valid information, especially for entry-level developers. Moreover, w3Fools is not a source of information. I feel it incumbent upon the more experienced developers to be removed from unrelated mudslinging when providing information, that we remain objective. To this end, I ask if it is acceptable for postings, either as comments or answers, that serve only to raise the w3Fools criticism, to henceforth be treated as the spam that it is.
Thanks for your consideration.