Recall what Deja Vu was...
Deja Vu was originally just an NNTP archive and search tool, and a well designed, easy to use one too. Until Google took it over. Personally, I thought it wasn't nearly as good a search tool as it had been after Google hacked it about and made it post as well: IMO they'd have done better to have left it alone and written their own newsreader to go with it since, at the time, the only really good newsreader was the excellent Forte Agent. Unfortunately, its Windows only. Like Mozilla Thunderbird, it handles both mail and newsgroups.
Meanwhile, if you want a decent newsreader with easy-to-use tools for blocking obnoxious posters and threads and that isn't windows-only, try installing Mozilla Thunderbird, which handles both mail and newsgroups. Pan used to be the top of the pack until its developers lost interest: it now seems to be abandonware.
Agent, Thunderbird (and Pan) all have good tools for blocking individual trolls and/or complete threads, and you can make a block permanent or just set it for a specified period.
Biting the hand that feeds IT
