I once heard in a lecture that the scholars of the past were very strict on grading the authenticity of the narrators of hadith.
The lecturer stated that there are some narrators who were graded as weak because they were seen eating while walking.
Also, some narrator was deemed weak because he was seen eating in public. Is this true? Would you be able to name the narrator who was deemed weak because of eating in public? Is there a reason for this other than it might make others desire the same food? Jazakallah.