This info is solely based on podcasts focused on legally matters but I think it is very common for the FBI to stop by someone's home and have a talk with them a

This info is solely based on podcasts focused on legally matters but I think it is very common for the FBI to stop by someone's home and have a talk with them about how thier online rhetoric and personal associations have put them on a list of people that they are keeping thier eye on. For many people, this is enough to convince them it's time to cool thier jets (again, this is my impression as a layman). I think this happens far more often than "he has a barn full of fertilizer and diesel and now he's calling rental places to reserve a big panel truck so let's shut it down"...