Where did modern claims about the so-called 'straw man' originate?

Various claims circulate about a 'straw man' — that a separate legal entity is created for each person at birth, that writing a name in capital letters changes its legal status, or that individuals have a secret government account linked to their birth certificate. These claims are not accepted by courts. Where did these ideas originate, and what is the actual legal basis (if any) behind them? Members are encouraged to examine the historical origins and to support their contributions with primary sources rather than repeating claims that have been rejected by courts.