Can users of a suitable reputation be allowed to add short comments
127922
Why not allow shorter comments?
51535
What's the justification for the commenting reputation requirement?
7494
Comment on posts that you have an open bounty on, despite reputation
22966
Penalise Downvotes without Comment / Reward Downvotes with Comments
41334
Please make pending edit suggesters be @reply-able in comments
44432
Allow anyone to comment but hide low-rep users' comments until reviewed
59454
Use of the comment package
51469
Allow converting comments to answers
44564
Should moderators be able to convert answers into comments?
96392
Comment on a question without 50 reputation points
135830
Could new users be prompted to edit instead of commenting?
134870
Different implementation of downvoting: require comments
87689
Can users with less reputation be allowed to chat?
15279
Implement a Selective Comment Ban
114749
Allow post editor to see @comments directed at him
47581
Marking comments as 'addressed by edit' to reduce noise
50262
Please enable low-rep users to easily breakout up and down votes on their own questions