Locking of questions is currently in place, and is typically used in cases like halting edit wars. However, instead of locking an entire question and its answers, I think that it would also be beneficial to able to lock individual answers, leaving the question and other answers still active.
Some reasons why I think it would be useful:
If an answer falls prey to an edit war: Admittedly, I haven't actually seen this happen for an answer, just questions. But locking only the answer would be a helpful option in such a case.
For specific use on MetaSO: There are a number of questions on MetaSO that have the form where the question is simply a container for a general class of feature request, with the answers representing the specific individual feature requests that are accepted or declined. For example, The Great Tagging Reorg. Some of the retagging suggestions in the answers have been completed, and these are indicated with a "DONE" icon placed at the top (example here). However, the answer can still be edited, voted on, and commented on, which isn't really of any use now that the request has been filled. The answer could be deleted, but then there's no record of previously suggested and accepted requests. It would be nicer if the answer alone could be locked, freezing the editing, voting, and commenting so that it can simply remain there for posterity.
So, what's the community's take? Is this a useful/feasible feature request?
EDIT: As Kyle so adeptly pointed out with his answer, this feature is already enabled. In short, you pretty much can't do anything to a locked answer... unless you're a mod, in which case you can unlock it.
As a summary, here's what you can't do to locked answers:
- Mark as accepted (I was kinda surprised by this one)
- Upvote comments
- Flag comments