1 new of 108 responses total.
You can only retire an entire item, not a single response to an item. So if I post a "Loest Pricess for Viagra" response to every item in coop, the only way to make them all vanish would be to scribble them. Even then users would still see the item come up new. When I did the pistachio interface, I have fairwitnesses the ability to customize the look of their conferences (colors, login screens, etc). Basically, none did, so I eventually added the ability of users to do such customization. I think one of the problems with this policy is that most conferences would announce no policy. Probalby the proposal should include a default policy for conferences who post none.
You have several choices: