Likewise, I hate googling for a discussion or review and finding a thread half filled with "This user has deleted their comments with a greasemonkey script..."

Likewise, I hate googling for a discussion or review and finding a thread half filled with "This user has deleted their comments with a greasemonkey script..." Besides, after an hour or so your comment is definitely already in Google and any HN crawlers, and probably on archive.org shortly after that.