It may be blindingly obvious, but I can't see the button to block an individual so I don't see their posts. I don't hyave anyone in mind, I'm just intrigued to know how its done.
And the other thing is that if someone quotes what someone on your ignore list has posted you see it. I have used the ignore button(and I still have one tedious member on it) it isn't perfect, but I guess it means you don't read all the dross form the offending member.