Answer:
You can double-check the author's authority.
Explanation:
Although the appeal to an authority is still a fallacy nonetheless, it is still better to have an authority to grant some level of credibility to a website than having just someone telling you that "it is trustworthy". A trademark or a way to contact the webmaster proves nothing at all. A random recommendation doesn't either, so at least a degree or some confirmation of involvement with a theme might help.
