Sounds familiar. There are two competing sides to the requested 'delete option for public comments', one which Ernest pointed out is the author's inability to edit their own comments (an embarrassment, but not harmful) and the second is the larger threat to readers by abusive comments.
Although this is welcomed, given how common these types of comments are on ALL social media outlets, I'll keep my one story comments locked, just to protect my users from further abuse.
I didn't really have that many public comments, and most of those I did have could easily have PMed me personally. But I won't allow isolated individuals to heap hateful tirades on my readers for their own benefit.
When the coast is clear, and everyone who posted forgets about it, I may reinstate them and then delete the two posts, but I'm not about to swing the barn door wide open after wolves have already descended on my literary livestock. After all, this is about protect my readers, not about my own fragile ego.