Eh, I don't know if this is really happening or not. If you go over to the actual "press release" on anonops and look at the comments, there's quite a discussion on if this should fly or not. Sure, there's some people calling on doing it for the lulz. But there are quite a few saying no, they will not participate, as much as they dislike Westboro. A few are calling for not silencing them, but doing some "investigation" and trying to dig up any dirty laundry to get rid of them that way.
But being that some of anon's strength lies in numbers, the disagreement and discussion is a good thing, I think. Even if some people go for it and disregard the argument that silencing free speech they disagree with is bad, the chances that they can do much damage are smaller.
Link to anonnews press release's comments: http://anonnews.org/?p=comments&c=press&i=449