What about highly upvoted/downvoted comments that are then edited to reverse or change the sentiment. Other conversation participants have no right to see the original context?
To be fair there are good reasons to have some deleted comments and this is probably not the right place for a debate, but it is not that cut and dry.
As an aside, I've found the whole unedditreddit ride extremely interesting I hope its not the worst thing you had to deal with.
http://www.reddit.com/r/bestof/comments/1ukgpm/the_moderator...