Pings and replies

Technically, you could, but it wouldn’t make sense to do this. A ping isn’t a comment. Nobody wrote on your blog. It’s simply notification from a ping-enabled site that shows that site linked to your post. The site that included your link might be a scrapper site, a spammer, or someone who legitimately refers to your post. Either way, they would never see any comments and I don’t know what comment anyone could make about a ping.