I've been pottering through the low-quality posts in the review section, and it appears a lot of them are of the form:
or just simply the code itself:
My personal approach so far has been to mark as "Not sure" any snippet that I don't understand (e.g. if I don't understand the language), and to recommend deletion for a snippet that I either know is incorrect, or that has been commented as such by OP.
However, I'm not convinced this is the best way to do it, and the sheer volume of such snippets suggests I'm not the only one "Not sure"-ing many of these!
Is there a good policy for low-quality posts that are just code snippets, or can we make one up?
Edit: After looking at some other related posts on meta, I came across Jeff's Test, which might inform your answers!