Chat filter for LFG/guild/trade ads?

[AlexFullmoon]

Basically configurable filter that silently drops chat messages that contain certain text.

• LFG and/or LFM — if I'm looking for group myself, but don't want to create one.
• WTS/WTB — although people do not always use them.
• Guild announcements — obvious. Since we now can link guilds in chat, they can be used by filter (I guess).

I know pChat has something of a kind, but it is not really configurable, and for some reason it doesn't really work for me.