法律找到了:(1) Duplication is prohibited when a key is stamped, imprinted, marked, or incised with the wording "Do Not Duplicate" or "Unlawful To Duplicate" and includes the originator's company name and telephone number. --- BUSINESS AND PROFESSIONS CODE SECTION 6980.53-6980.69 这个是限制锁匠的
【在 f*******n 的大作中提到】 : 为什么违法呢?有什么法律说不能配上面写do not duplicate的钥匙呢?