I'm certainly no expert on mailing lists, but I think that there is a way for the list administrator to configure the mailer so that it does not send these messages to the entire group. This is the only mailing list I've ever seen that sends all this garbage out.
We can all badmouth this email client and that email client, but it's a waste of time doing so. You are never going to convince many people to use other software or another operating system. Just not going to happen. This is just my opinion and you may not agree.
----- Original Message -----
From: bt.email.antivirus@bt.com
To: inkscape-user@lists.sourceforge.net
Sent: Sunday, October 09, 2005 11:59 AM
Subject: [Inkscape-user] BT Messaging Anti-Virus Alert

Notification Of Blocked e-mail - This message is intended for BT employees only.
All other recipients: Please ignore this message and accept our apology for any inconvenience (N.B. the links below are private).

An e-mail (summarised below) has been blocked at the BT e-mail gateway because it contained an attachment of a potentially dangerous type or a computer virus.