"Filter those users you don't want to receive mail from, personal messages in games or to comment in your blogs."
My Version: Basically used to prevent annoyances or the negative folk that are not social in r/l and feel the need to get their negative social on in your blog which is an annoyance. You can simply block these annoyances by using the filter button & you don't have to hear from them again! Filtering someone does not mean you are a "pussy" but a problem solver.