Lately I have seen various comments overly focused on small details of the question/answer, which, rather than being aimed at improving the content, seem to me borderline trolling.
when it happened to me I answered the first one and then ignored the following. However, since I am not sure the user is really trying to troll or simply being overzealous with commenting, what could be a better way to deal with this situation?
EDIT: To give an idea of the type of comments I am referring to, let's say the question contains the sentence "On a street a couple of persons..." and a photo of 2 adults and 1 kid on a sidewalk. The comment would be "The photo shows 3 persons!" and then afterwards "but they are not on the street, they are on the sidewalk"
EDIT 2: For a real example see my answer here and RonJohn's comments, followed by Geoff's one.
EDIT 3: Just another example of similar behavior.