Considerable tension was generated in the late 90s when self-defined "Psivamps" who didn't want to drink blood themselves began to universalize their own prejudices and insist that no one really needed to drink blood, and Sanguinarians "just need to learn how to psi-feed." The opinion among some other Vampire-Identified People that Sanguinarians are "less evolved" than "Psivamps" has continued to upset the Sanguinarian community. (See "The 'Psivamp Revolution' and Its Fallout".) Some Sanguinarians are extremely defensive and will break into rants about "everyone" supposedly believing that "Sanguinarians get energy from blood" at the slightest provocation (or no provocation at all).