Because comment flags were historically some of the worst / least appropriately used flag types, we made comment flags require a reason:
Requiring a reason definitely helped improve existing comment flags that we now see.
The current default comment flagging reasons are
- rude or offensive
- not constructive / off-topic
- too chatty
- other (requires text)
Do these default reasons capture -- without getting into obsessive detail -- the most common, valid reasons to flag a comment?