How ironic. I had asked Anthere about this during our interview (see
http://en.wikinews.org/wiki/Wikinews_interviews_Florence_Devouard%2C_chair_…
).
I think that the most popular form of this "vandalisim" is changing the
logo. The logos aren't copyrighted by WMF, so it's really bad to be doing
that. I am not completley against small amounts of vandalisim that could be
easily reverted, but otherwise, things like changing high-risk templates,
etc. is horrible.
We need to have a load of people on RC Patrol that day. Especially admins,
so they can easily revert.
ThunderHead