Hmm. "self righteous indignation" may be a way to describe such absurdities, but is it that much different from the same indignation which leads to women being beaten on the streets for not being veiled and stoned to death for pre-marital sex?
I'm sure that the people who put up such sites as Exposing Satanism do so for the best of intentions (and the site includes the caveat "While they are wrong in their beliefs, God still loves them even though they have chosen to follow false gods. Jesus Christ died for them too and it is our responsibility to pray for the blinders to be removed from their eyes"), but that doesn't make them right. Like everyone else, they are merely making God in their own image - in this case blinkered, bigoted and ignorant.
Thus such "fears" as Joe mentions should not be respected. They should be exposed to the light of truth and reason and shown up for the ludicrous, purblind, backward nonsense that they palpably are.