On what grounds do you say that the Phelps orchestrated a hoax? They maintain credibly that they received emails purporting to be from the hackers.
Oh and Bison, you have a massive logic fail here:
"Lying for Jesus" is a great Christian tradition in some sects. US fundies are notorious for it.
You must have missed that. Selective reading is not a virtue, old chap.

The Church has been much longer in the public eye than Anon about whom few had heard till a few months ago in the wake of the Wikileaks pandemonium. Everybody knows the Phelps clan. The web is awash with articles and interviews and documentaries on the church. They’re not starving for publicity. If anyone’s gained in stature here it’s Anon.
Well, Anon was actually well known before this incident, and well before the Wikileaks incident. You may have missed them, but a lot of other people already knew of them.
If this were a simple matter of hacking, it would not receive news coverage. Just another case of vandalism. But when done by a group whose claim to fame is preserving internet freedom, it sheds its credibility faster than you reach for the Kleenix when you slip in the gay porn.
What matters in the final analysis and the reason for which this is news at all is not the hacking. It’s newsworthy because an activist group ostensibly committed to free speech has shut down a website whose politics it does not like.
It's noteworthy because apparently somebody, who claims to be affiliated with a group that is very loosely and anonymously organised in any case, decided to point out that if Anon did wish to hack the Phelps site they could do so at any time, and therefore if the Phelps site was not being hacked it could reasonably be concluded that Anon had no interest in hacking said site.
ETA: BTW, I agree that this (hacking) was probably not the most intelligent way of making the point.