[Pan-users] Is there an easy way, in Pan 0.135, to delete all threads with a score of 0?

[Rock]

I would like to delete all threads that I haven't participated in.

Certainly I select and delete threads manually, but, is there a
way to simply delete all threads which I haven't posted to?

That is, given I give myself a high score (+1000), is there a way 
to easily delete all threads which don't meet a minimum score of
zero?