Firstly, though the WBC is despicable they should be allowed to say what they want. The free speech equals hate speech thing is void as that is the point- there should be no restraints on freedom. A little bit of freedom for those who deserve it was pretty much the motto of the slave trade, or apartheid. If the mainstream news didn't report on them planning to be abhorrent in the name of God they would have stopped years ago and moved onto something else. That something else may have been worse but it may have shown their poor children that nobody takes them seriously (watch the two excellent Louis Theroux documentaries on them to see how the teenage girl goes from being timid and unsure to just like her mother in 4 years, and to see the 11 year old boy quietly saying he has to suppress his thoughts).
Secondly Anonymous is just a word that is applicable in a lot of situations, in this one those that hide behind their V masks in the name of left wing justice are outweighed by those that hide behind them on their multitude of fake facebook accounts where they insult fellow schoolchildren and post statuses about paedophilia. Or harrass any female that dares have an opinion anywhere on the internet. The sad thing for the hackers is that 4chan users seem to believe anonymous is a word made just for those on /b so when 'a group of anonymous hackers' is mentioned they go nuts taking all the credit when it is highly likely very few of them actually trawl through the mountains of gore, jailbait and dragonball z references daily.
In summation, don't advertise the WBC and don't get so angry at them that you bring them to the public eye. Let them hate, sooner or later it will wear them down.
PS- takes the heat off the anti vs pro gun debate that the pro side were trying to turn in to an anti vs pro media debate doesn't it?