Career
He has been an expert witness. Various groups, including the Aumism movement and the Belgian Raelian Movement, have opposed Abgrall. Dick Anthony and Thomas Robbins have written that in their view, Abgrall"s theories of brainwashing are pseudoscientific, and so unsuitable for use as a basis for legal judgments in cases involving cult membership.
They qualify Abgrall as the "leading psychiatric consultant to government agencies and legislative bodies concerned with controlling and suppressing non-traditional religions", noting that Abgrall"s brainwashing theory has served as the primary psychiatric rationale for anti-cult laws,governmental rulings, and legal cases brought against alleged cults in Europe.
Abgrall is has also had an impact on former communist countries through the dissemination of official governmental reports from Franc and Belgium that he helped produce. In 1996, the French government set up an Observatory body to investigate cults and sects, the Parliamentary Commission on Cults in France.
Abgrall was a "key actor" in these investigations, preparing official reports in France and Belgium, and was an active anti-cult movement spokesperson in the European media, in particular television According to Dick Anthony, Abgrall emerged as a key "cult expert" in France, because he was the first psychiatrist in France willing to embrace brainwashing theories.