There was an answer to this question, which I flagged as low-quality, since I thought it was beyond repair and full of nonsense. It was not the case that it contained an error or so, it was as if it was written under the influence of something really expensive. At least, that's how I remember it.
The flag was declined with the reason "declined - a moderator reviewed your flag, but found no evidence to support it". Fair enough, I know that moderators should not be judges of mathematical content, and in hindsight this answer might have been in a grey area.
However, the answer is gone now. What is the reason for that? Did the original poster remove it himself/herself or is there some other process for removal of answers?
Also, I think the help center could make the flagging process a bit clearer. For me, it's a bit confusing what happens when a question or answer is flagged depending on the flag type. Does it go in a review queue for community handling or does it cause moderator attention? I would for example be more hesitant to flag a post if it increases the burden on the moderators compared to if it goes into a queue handled by a zillion of users.
I might add that if I had known that the flag would be handled by a moderator as opposed to being added to a review queue, I probably wouldn't have flagged.
Why not add an array in the help center having flag type, description and action as columns?