I understand that's in jest, but just to clarify the serious intent:
Absence of copyright is not license for fraud. You are welcome to "steal"
any work of mine (I put that in scare quotes because I don't believe in
intellectual property law, and it isn't theft unless you do). You can
even remove any identification from it, modify it, and resell it. But to
actually claim authorship would be fraudulent. But /I/ would still have
no standing to complain. Those who bought from you what you misled them
to believe was your original work would have standing to complain when
they discovered otherwise.