Block import of RSS feed based on word or string

Sometimes I see an imported RSS feed that has errors in it such as server errors with an Apache code or I see some kind of content that I'd simply not want on the site.

I hope that there will someday be a way to block a feed article that might include certain strings such as "server error" or whatever other terms I might see repeated so I don't have to monitor the feeds for problem posts.

Thanks. -- Rik