Slightly OT: Why all the spam?

[Joel Hedlund]

> Thus you may want to consider reading c.l.p via nntp when at work.

I'm doing that using Thunderbird 1.5.0, and I still get the spam. 
Googling for a bit shows me that people have been having issues with 
Thunderbird not removing expired articles all the way since 2003.

Does anyone have a suggestion on how I can make thunderbird remove 
expired articles? Or should I perhaps use another news reader?

/Joel