I flagged an answer as 'spam', because the content was something like
I am Jeff. Jeff Jeff Jeff. etc
The post was deleted - yet my flag was declined. Why?
For 10k+ers: Short-sighted and Near-sighted
Because it is not selling or promoting a product or service. It's just a vague quote from a kid's book. "Not an answer" would be appropriate for this type of post.
It matters insofar as spam flags train our spam filter, which is why your flag was declined.