This is a board on how to stop and prevent trolls and vandals from doing their job on the wiki.
First off, to protect against potential IP vandals, admins must protect highly vandalized pages to registered users only. Main page should only be accessed by admins and admins only. Admin rights should only be given to trusted users.
To stop existing vandalism, please revert it, or if you don't want to, go to Special:Listadmins, find an admin who logged in recently and notify them on their message wall, so that they can rollback the mess and block the perpretrator(s).
The latter applies to non admins. Vice versa. Keep this in mind!