Most platforms for the last decade have used phone numbers for real-human detection. Facebook is well known to quickly lock new signups' accounts until they giv

Most platforms for the last decade have used phone numbers for real-human detection. Facebook is well known to quickly lock new signups' accounts until they give a phone number. Obviously that can be gamed by some people in some places, but all countries on earth have mobile phones now and purchase of a SIM card often requires showing ID to authorities.