What is the illegal code in BCD?

Could you please clarify what exactly do you mean by "illegal code in BCD"? BCD, as I understand, could refer to a variety of contexts, including but not limited to Blockchain Digital Currency, Bitcoin Diamond, or Binary Coded Decimal. If you're referring to a specific cryptocurrency or technical aspect, could you be more specific? Is there a particular aspect of BCD that you're concerned about, such as its coding practices, regulatory compliance, or potential vulnerabilities? Additionally, if you're referring to illegal activities related to BCD, it would be helpful to know the specific nature of those activities. Please provide more details so that I can better assist you.