Back in the days of reading network news on unix boxen, the readers (rn, trn, nn, etc) supported kill files, on a newsgroup by newsgroup basis. This allowed one to put a subject line in the killfile and have those articles not be presented.
It would be nice if one could have a similar list associated with each feed. If the subject matched that regex, it would be marked read.
For instance, one feed I read has a plethora of articles titled “Baby Boy” and “Baby Girl”. I don’t need to see this.