The mailing list owners have a problem anyway. With majordomo you
can filter keywords, and subject lines etc
In general http://www.vix.com/spam is the definitive site
In the case of the yoyo.com spams please forward them to
postmaster@unitedmedia.com
pointing out the Dilbert game is part of the yoyo spam and informing
them you will never buy or recommend a dilbert item again until they
withdraw from their deal with yoyo.com (yoyodyne games).
If enough people block Dilbert they'll notice - and the internet is
the big selling place for dilbert
Alan