I have long pondered the very question you pose.
It is easily explainable, it could be several causes
a. subtly subversive baker
b. subtly subversive poster of questionable notable
c. crush for time cause baker to post as notable something that is questionable
d. the scientific naivety of baker
pic your most likely
I believe it a combo of c & d in almost all but NOT all occurrences of the phenomena you mention