disallowed

I am receiving an error message when ever i try to edit smthing in orkut.the error message is as follows "You have temporarily been disallowed from performing this action. Please try again after some time."

some servers have this nudity detection softwares installed which doesnt allow some pornographic sites to open... can anyone tell me on which basis or algorithm this software work ?? one server disallowed a photography site of a wellknown person as porn....