Ya care to show us where counterfeit currency possession is legal? Why are their Federal charges named "conspiracy to print, pass or possess counterfeit currency"?
Counterfeit Deterrence Act of 1992 (18 U.S.C.A. § 471 note) to increase penalties. Prior to the enactment of new law, it was not a criminal act to manufacture counterfeit U.S. currency. The law also instructed the Department of the Treasury to redesign paper money in order to make it more difficult to reproduce. In 1996, the first new currency was released.
Oswego, NY -- Oswego police have charged a Syracuse woman with criminal possession of a forged instrument, first degree, a felony.
Tanya A. Fenske, 25, of 1265 W. Genesee St., was arrested Jan. 13 in Syracuse. Oswego police say she possessed counterfeit United States money at 21 E. Bridge St., Oswego on Nov. 30.
She was arraigned in Oswego City Court and sent to the Oswego County Correctional Facility.
http://www.syracuse.com/news/index.ssf/2010/01/syracuse_woman_charged_with_po.html
As far as unlawful intent, you would be VERY hard pressed to prove you had no intent when you participate in such public online forums, advocating this as a "hobby" and giving instruction and advice on counterfeiting (i.e., "Use 20# paper")