I read the newsgroup through the Mozilla Thunderbird email program, which is awesome. It downloads each message as it comes through, and it allows filters for unwanted posters. Whenever I see a spammer, I just click on the message, and choose Message, then click on Create Filter From Message. Then the next time that poster sends something to the newsgroup, Thunderbird automatically deletes it before I can see it. It's awesome.
You can download Thunderbird for free, as it's an open source program like the Mozilla Firefox browser, which is also an awesome program, by the way. mozilla.com
Hope this helps some of you who are having difficulties. We don't want to lose you!