Spam on www-style

This list gets a *LOT* of spam with 'jjsolari@pobox.com' as the From address
and 'jjsolari' as the From name.  Most users probably know to just delete it
(I already have have a filter for it), but some of it looks dangerous.  Is
there a list administrator who can just ban that address?  I looked on the
W3C Web site, but I did not find such a person mentioned.