I sometimes leave comments that are definitely
Noise, and should probably be removed as soon as the other person sees it. (No, I don't really want a private-message system. I like the open community here.) I'd love a mechanism that would help me remove my own comments at some point in the future.
What I think would be ideal would be a flag on my own comment that deletes the comment after the mentioned user sees the comment. Second best would be a flag on my comment that automatically expires my comment after a few days. Third best would be a flag on my comment that puts my comment into the 'Flags' 10K queue and let others flag-delete my comments for me. (Seems wasteful of eye-time, but does let others decide if my comment is really
Noise or not. :)
The Activity|Comments page is alright, as far as it goes, but sometimes I know when I write my comment that it should be deleted again in a while.