Remember, Silk Road was finally found and taken down because Ross Ulbrich messed up his OpSec on a Stack Overflow question.
Here’s a Reddit discussion: https://www.reddit.com/r/webdev/comments/1nln17/the_stackove...
Basically, he posted to stack Overflow using his own name and email address with code that was Silk Road was using. He quickly changed his username, but it was too late.