The most common flag reason that I get is 'not an answer'. Sometimes this is clear cut - its spam or a 'thank you' or something like that. Regularly its a judgement call as to whether something is strictly an answer.
The problem with flagging such posts is that I (and other mods and high rep users) are presented with two (not particularly nice) choices, after taking some effort to read the Question and all the Answers including the one being flagged:
- Delete the post - I don't have any facility to put it 'on hold' like questions pending discussion
- Enter into a discussion with the poster about the quality of the answer.
What should I do?