I think we have little choice but to be skeptical of all sources, all the time. Even those who have earned our trust as reliable sources can make mistakes.
Someone described a telling example. They said when you read an article about something you don't know much about, you might find it interesting and informative. Hm, I didn't know that. But when you read an article about something you happen to have some expertise in, you see that it is full of errors and misrepresentations. Makes you wonder about all those informative articles. [Note: I am sure I am getting this story wrong.]