Colorado Supreme Court

"A governmental purpose to control or prevent certain activities, which may be constitutionally subject to state or municipal regulation under the police power, may not be achieved by means which sweep unnecessarily broadly and thereby invade the area of protected freedoms. Even though the governmental purpose may be legitimate and substantial, that purpose cannot be pursued by means that broadly stifle fundamental personal liberties when the end can be more narrowly achieved."

-- Colorado Supreme Court

Source: City of Lakewood v. Pillow, 501 P.2d 744, 745 (1972).

http://quotes.liberty-tree.ca/quote_blog/Colorado.Supreme.Court.Quote.1A03