I fear I don't have any idea writing scripts (and any neighbourhood with that kind of knoledge either), but the online filters look quite useful, thanks for the link!! However, I still think it would be a good implementation for liferea!! 

2013/9/25 Simon Kågedal Reimer <skagedal@gmail.com>
Hi!

On Wed, Sep 25, 2013 at 12:35 PM, chronos884 . <alex.vlc88@gmail.com> wrote:

> I write for a feature request. I think it would be very interesting to
> implement something like a blacklist and whitelist of words for each feed
> channel. This way, when a feed had a word in the blacklist, it wouldn't
> download the new updates which would have the word listed in the title.

Just for the record, I'd like to mention some possibilities to get
this job done without having a feature added to Liferea:

1. Liferea has the ability to filter feeds with an arbitrary
processing program - go to properties for the feed, "source" tab, and
you'll see the "conversion filter" option. Now you "just" need some
kind of script to do this kind of blacklist/whitelist filtering -- I'd
bet there is something, somewhere if you google well. Otherwise do it
yourself, or have your neighbourhood hacker do it :) I think the
"Feedparser" library for Python should make a thing like this
reasonably easy to do.

2. Use some kind of web service to filter the feed for you. Here are
some suggestions I googled up, don't know anything about their
usefulness or status:

http://readwrite.com/2008/03/04/6_ways_to_filter_your_rss_feeds#awesm=~oiud34d58toDre

Regards,
Simon