Edited sentence: "  He has been known to contact employers of his critics to call for their dismissals.He claims that he has only responded in this way to "personal attacks," and asserts that he welcomes "responsible" criticism.He has also threatened to report critics (including owners of Web sites with articles about him not to his liking) to various governmental agencies (local, state, and federal), often for "harrassment" but occasionally for "aiding the terrorist cause.In response to his many claims of having made important discoveries, doing crucially important government work; and knowing or being related to or endorsed by important people, some have reacted with scorn.Sarfatti has, on occasion, referred to his claims of doing sensitive government work in order to attempt to silence critics.Typically, he claims that any public criticism of himself or his work can disrupt this work and hence is harmful to the national security