Joseph:
You wrote: “Gaon, Halacha empowers us (meaning Beis Din bzman hazeh) to enforce bein adam lmakom Halachas, even via corporal punishment if necessary.”
Can you provide a reference please? Are you insinuating that the BD has the authority to reject a Baal Teshuvah (which is not the halacha that HKB”H follows)? Can BD punish someone who is mechalel Shabbos? Which BD, and how do they exercise that authority?