The 72-year-old, who has lived in the town since 1971, was originally charged with four counts of taking indecent liberties with a 9-year-old girl and an 11-year-old boy in 2005.Link
In March last year, he was allowed to plead guilty to a lesser charge of aggravated indecent solicitation of a child, and the original charges were dismissed.
District Judge Ron Svaty ordered him to position the signs as part of his punishment as well as house arrest and five years probation.
Schad is now appealing the order which forced him to post the signs a few months ago.
He said: "I know that I deserve something for that, but I don't think I deserve what I got."
Mark Frauenfelder is the founder of Boing Boing and the editor-in-chief of MAKE and Cool Tools. Twitter: @frauenfelder. His new book is Maker Dad: Lunch Box Guitars, Antigravity Jars, and 22 Other Incredibly Cool Father-Daughter DIY Projects