Wlork The Reject report button is now working. Additionally, the number of reports required to hide a comment can be set from the extension's settings page.
You had requested a message to be displayed to other members in place of the hidden comment, but I did not include this feature. If there is interest in using this extension, I may consider improving it further.
Note: The Flags extension considers only one report per member. This means if the same member reports the same comment a second time, their first report is removed. (This is how it worked during my tests, but I didn't examine the internal logic.) What I mean is that the number of reports specified in the settings represents unique user reports.
I will create a topic for the extension later today
