Some sovereign citizens are involved in other forms of conspiracy theories, including QAnon. Certain subgroups within the movement adhere to theories about extraterrestrials and reptilians. One advocate of sovereign citizen fraudulent tax avoidance schemes, Sean David Morton, was also active as a psychic and ufologist. In Québec, sovereign citizen ideology has been promoted by anti-vaccine activist and AIDS denialist Guylaine Lanctôt.
