I thought I was designing for SpaceX, it may have been for the Silk Road
The lawyer was correct.  If you have reason to suspect the FBI is watching you, they already have what they need.  The men-in-black routine is meant to alter your behavior, to cause you to do something rare like empty an account or contact a distant friend.  This was federal investigation 101.Walk past the car and photograph the driver.  They really love that.