The Candlemakers' petition is a well known satire of protectionism written and published by Frederic Bastiat in 1845, in which candlemakers[?] and industrialists from other corporations petition the legislative body to make a law to protect their trade from the unfair competition of a foreign power: the sun.
... for a clear discussion of two prominent proposals.
Examples of existing "digital rights management" and "copy protection" systems:
Serial copy management system[?] ...