Is there any way we can rescue this site from the grips of the **** spammers?
Can the site be renamed and a new one started taking with the old one selected members only?
No. Neither Yahoo nor the group managers care to manage.
there are no spammers here, all the messages are written by well aware moderators or members who point at real flaws
The owner of the group can ban spammers and change the name of the group. If the owner is nowhere to be found, a longterm member of the groups can contact customer care and ask to be appointed "full moderator"