I’m particularly annoyed by sites that look reliable, but spread the dubious Goebbels quotation that this blog is following. That is almost always a sign that a site should be avoided.
One example is the Holocaust Education & Archive Research Team. On the surface (but only on the surface) it looks to be a scholarly site, although it provides very little information on who is behind it. However, its page on Joseph Goebbels is headed by the dubious quotation. I’ve twice e-mailed them, but they haven't removed the material. On the same page, they reproduce a large section of one of my translations, with no credit.
In short, it’s not a site to be recommended.