Haredi Commando Shuts Down Website

Here's something interesting:

A group of ultra-orthodox hackers, shocked by the obscenity of some porn sites, has launched an internet campaign in a bid to cause such sites to crash. The hackers, already named at some internet forums the "ultra-orthodox sex commando," or the "ultra-orthodox electronic underground," focus their efforts at this point on Hebrew sites.

How do they know that they are obscene?