Today I have seen that some low-rep. user has been suggesting edits to many posts. Generally, this is a good thing. However many of these posts were old (at least a month old), and often downvoted. The changes themselves were not always significant.
Since the review page does not tell you whether another user has reviewed and approved/rejected this, and most people would usually approve a reasonable grammatical/LaTeX edit (even without checking timestamps), many of the edits went through.
When something like that happens, and I feel reluctant to approve the edits, but I also feel that the user is acting badly, what sort of action should I take?