Bob,
When we determine that a lot of emails are coming from one place we can block that address or Mail server. Even with many servers already blocked I am averaging over 100/hr. Our mail server scans the mail and takes out the virus now, so I don't get them and they're automatically filtered by my email program (Eudora) and put in a special folder for disposal later.
Even though I don't have to wade through them like the first day I know it's still a strain on our server resources and figure it is causing some slowdowns in general.
The people that write and spread this stuff are hurting everyone.
Bill