Attacks are of course going too far, but not expecting some form of legitimate resistance is naive, at best. Combine that with the outrage the internet tends to generate, and this behavior, while reprehensible, shouldn't come as a surprise.
Morals never have, never do, and never will dictate art. The sooner people recognize that the answer to something offending your sensibilities is to move on from that particular thing, rather than writing screeds which will be ignored by the perpetrators at best and heckled at worst, the happier we'll all be.
*edit Guess that's what I get for not reading the link. Site's being websense'd, so I can't actually see it. Thanks for the editorialized, BS headline, submitter > : (