Every now and again, some troll comes along and posts a answer like:
I hate xxx, xxx is <
insert profanity here> I hate xxx, xxx is <insert profanity here> I hate xxx, xxx is <insert profanity here> I hate xxx, xxx is <insert profanity here> I hate xxx, xxx is <insert profanity here> I hate xxx, xxx is <insert profanity here> I hate xxx, xxx is <insert profanity here> I hate xxx, xxx is <insert profanity here> I hate xxx, xxx is <insert profanity here>.
These answers get deleted fast, but...
Having 20k+ rep, I have to look at this nonsense.

Is there an option to permanently/hard delete hate answers posts, so they go away, or must we look at them for all eternity?
Option 1: hard delete
Note that I'm not asking for automated tools, but moderators should have the option to nuke a post only if it's entirely free of any informational content whatsoever
Option 2: allow moderators to edit a deleted post
As per David's suggestion, an option to allow moderators to edit a hate post would fix the problem whilst leaving an audit trail, something like:
This option has the advantage that the problem is solved, but nothing is permanently erased, because the edit history is still there in case you want to check what all the fuss is about.
Update
Fixed in build (rev 2013.10.8.1061).