i've said this in replies to people but never on its own, so here it is:
rethink the assumption that open, unmoderated signups should be the norm.
open signups are a tool for growth. capitalist platforms adopt open signups because they prioritize growth above all else. if you value fostering a healthy community, you *cannot* have 100% unmoderated signups. closed networks can control registrations by banning clients once. an open network cannot do this.