Global Filters Explained These global filters use some complex regular expressions, and deserve a little more explanation. There are six global filters in the archive:
Hilite if 'subject' contains the Reg. Exp. "^Re:"This filter hilites articles that are followups to an original articles, shades them dark gray, and lowers their score slightly. If you're sorting by score, this will cause new topics to appear above any older threads.
Kill if 'Xref' contains the Reg. Exp. "[^ ]+ [^ ]+ [^ ]+ [^ ]+ "
This filter removes any articles that are crossposted to four or more newsgroups. It's amazing how much clutter this single filter can remove. This filter may slow down article fetching (slightly) if you are not using the XOVER command to get article headers -- see Simon Fraser's page on this subject for an in-depth discussion.
Kill if 'subject' contains the Reg. Exp. "^(Re: )?[^a-z]+$"
This regular expression matches any subject that does not contain a lowercase letter -- in other words, subjects in ALL CAPS. This filter removes a lot of shouting and noise.
Kill if 'subject' contains the Reg. Exp. "^(Re: )?FS:?|WTB|for sale|\$\$\$|CA[S$]H|MONEY"
This filter removes 'for sale' articles, 'wanted to buy' articles, chain letter scams and messages from con artists.
Hilite if 'Xref' contains the string 'news.answers'
This filter hilites FAQs (Frequently Asked Question files), and brings them to the top of the window. This can be very useful when reading a new group, as the FAQ contains a lot of useful information. This filter is a little more reliable than the original "hilite if 'subject' contains 'FAQ'" filter.
Kill if 'subject' contains the Reg. Exp. "George Carlin's Seven Dirty Words....
This filter is deliberately designed to scroll off the right side of your screen, so that the actual list of naughty words isn't shown (and I've omitted the list here too -- you can double click on the filter to see and edit them, if you're so inclined). For those who "show killed articles," this filter takes things one step further: It hilites the article using light gray text on a light gray background, so that the text of the Subject is utterly unreadable. You probably wouldn't want to use this filter if you're reading alt.sex (for example), but it does remove some really off-topic articles from places like comp.sys.mac.system and news.groups.
It's no substitute for SurfWatch or a similar program if you're trying to protect your children; don't rely on this filter to protect the innocent (and keep in mind that the little tykes can access the list of dirty words by double-clicking on the filter).
Last update: 7 Jan 2004