Isn’t everyone worried about being microchipped? If not by the government, then by someone else? No? Here’s a law that’s on the books in Wisconsin:
146.25 Required implanting of microchip prohibited.
(1) No person may require an individual to undergo the implanting of a microchip.
(2) Any person who violates sub. (1) may be required to forfeit not more than $10,000. Each day of continued violation constitutes a separate offense.
You’ll find the source here.