I have received a reply to my support query about marking comments as spam from YouTube:

“Thanks for your email. The “Mark as Spam” feature is there to help us recognize messages which are spam. If you see any comments which are spam, please click on “Mark as Spam” and the comment will be removed from the site. This helps us keep the site clean and spam free.”

Now, maybe it’s just me, but when I upload videos I allow comments but only if they’re approved by me, i.e. I get a notification of a comment, go to the video and approve or delete them or indeed mark them as Spam. In my case, the reply that “the comment will be removed” doesn’t appear to be correct. When I mark a comment as Spam, it shows as being marked that way, but as soon as I reload the video page or log out and log in again, the comment is still there awaiting approval and has to be manually deleted.

So what’s the point in marking the message as Spam, especially as they’re almost exclusively from “fire and forget” YouTube accounts? All it does is make more work for me.