It recently came to our attention that there was a bug in our comment code that allowed users to delete comments from videos which were not their own. Unfortunately, by the time we became aware of the issue several users exploited the bug to maliciously delete thousands of comments from other users videos. We have since fixed the bug and are actively working to restore all the comments that were removed.
To all of our users who had their comments deleted, please accept our most humble apologies. There is absolutely no excuse for what happened, it was a bug in our code - and one we should have caught.
We can only say that we are feverishly working to restore your comments and we'll do everything we possibly can to make sure something like this does not happen again.
To all of our users who have been abusing comments with flagrant spamming, hate speech and other malicious activities - this behavior
will simply not be tolerated on our site. If you engage in such activity be forewarned your account will be deleted and you will be permanently banned without warning.
YouTube is a place for everyone to express themselves. It is meant to be a creative, entertaining and democratic environment. Let's not allow a few bad apples spoil the bunch.