I'm not exactly sure if this is appropriate for Meta but I was wondering if Stack Overflow or Stack Exchange in general uses some kind of machine learning for post classification such as spam or blatant no-effort questions. From this answer, it doesn't seem like it. If not, are there specific reasons why not, and is it something that could be implemented in the future? The SEDE and data dumps seem like good resources for training a machine to do some basic filtering of low-quality posts.
Does Stack Overflow/Stack Exchange use machine learning for post classification and if not, are there specific reasons why?