Any kind of built-in AML/KYC tools in Bitcoin is bad, and might draw
expectations from _all_ users from authorities. Companies or individuals
who want and/or need AML/KYC can find ways and do it at their side
isolated from the entire network, and the solutions shouldn't come from
upstream. AML/KYC/<insert other regulation here> differ from country to
country and will be hard to implement in a global consensus network even
if it would be worth it.