Can anybody give me a brief introduction to the Stack Overflow flag system?
How much reputation does a user need to flag a question or answer?
How do flags get reviewed?
Who can review flagged questions and answers?
If the flagged post is valid, but numerous users have flagged it, what action(s) do moderators take?
How many flags are needed for a stupid answer or question to be deleted?
Your questions are answered on the following two privileges sub-sections:
What happens when I flag something Offensive or Spam?
The offensive and spam flags are designed to automatically eliminate truly offensive posts through the collaboration of the community.
3 flags -- post is banished from the front page. 6 flags -- post is locked, deleted, and the owner loses 100 reputation. Users with the Moderator Tools privilege can see how many offensive flags a post has accrued, and may opt to flag it themselves.
What happens when I flag something Requires Moderator Attention?
You'll be required to enter a comment briefly explaining what the problem is. After that, these moderator flags go in a special high priority queue visible to all moderators. We take moderator flags quite seriously; rest assured that they are all followed up on!
When should I act on vote-to-close and vote-to-delete flags?
...
These flags will appear on the list of flagged posts in your moderator tools. You will not be able to see who cast each flag, however. ...
