Reply To: Compelling All Jews to Perform Mitzvos and Follow Halacha

See Shailos Ut’shuvos Maritatz Even Haezer 2:20, I believe. Also, even in cases where we would apply this it would require an accepted Beis Din by an entire community. 3 guys can’t just get together and claim that Beis Din Malkin V’onshin Shelo Min Hadin.