I was interested to hear on the BBC Radio 4 program - Start of the Week - of 9 February 2009 - that the cartoonist, Martin Rowson, said that atheists are among the groups that send him hate e-mails for his cartoons, along with Muslims, Zionists, Catholics, American Neo-Cons etc, etc.
You can listen to the program at
http://www.bbc.co.uk/radio4/factual/starttheweek.shtml - start listening at about 20 minutes into the program if you don't want to listen to the entire thing.
He mentioned a particular incident where atheists were outraged by his cartoon of Richard Dawkins which apparently was published on the front of New Humanist magazine.
I hope atheists are not going to become yet another intolerant and humourless pressure group.