Make closing question users post a conscious explanation
31985
Should a user be forced to add a comment when they vote to close?
141049
Incorrectly able to answer a closed question
31940
Add an alert when answering a question that has at least a close vote as duplicate
11483
Help us make "Not Constructive" and "Not a Real Question" closures more effective
115812
Allow locking of answers
56691
Disallow closing of questions with a certain number of question / answer upvotes
20483
Improving "demonstrate a minimal understanding" close reason
15588
Introduce a  "general reference" close reason
5563
Asking users to accept answer when they comment that it answers their question
77934
Why there isn't a feature that lets any user on SO to request other user to answer their question?
74107
How to appeal a closed question?
37750
Display "Closed as ..." before the actual question
38781
How can I get a notification when someone else's question is reopened?
158061
Let questions stay open for a minimum amount of time before being closed
22841
Discourage questions being marked as answered within an hour or so of being posted
102311
How does the system determine which one close reason should be displayed on a closed question, given the close votes?
65584
Give badges to people for coming back and answering their own question