It does not seem right that anyone with access to our Aha environment should be able to edit someone else's comment. While notifications and history on the object may help identify when such a thing happens. But not having that ability to begin with seems better way to go about it.
Thank you for your idea. Currently only administrators can edit other users' comments. As long as the users you have provided access to do not have administrator access they will only be able to edit their own comments.