Why does everyone, including Ms. Lovecruft conclude that something is horribly wrong and that FBI wanting to speak with them means they are in deep shit? I'm by no means defending them, but to me, the whole (original) post looks overly paranoid.
I'm not an American, you can speak with Police freely here in Slovenia, so maybe I understand things wrong?
For a developer of a tool frequently used to conceal "terrorism", this amount of paranoia seems healthy.
Also, no you cannot "speak with police freely" in the US. Anything you say to an officer of the law can be, and it should be assumed that it will be, used to incriminate you. To make matters worse, you can be forced to give up your right to self-incrimination by being legally compelled to divulge information which incriminates you.
In general one should never speak to police in the US. Not even as the whiteness to a crime. For a great overview of the seriousness of why one should never talk to US police, view this lecture by a professor and former criminal defense attorney: http://youtu.be/6wXkI4t7nuc
Incidentially, the American Civil Liberties Union of attorneys (ACLU) has created a series of mobile apps to record police encounters because of their tendency to be problematic for citizens. For example, https://play.google.com/store/apps/details?id=org.aclu.mobil...
I'm not an American, you can speak with Police freely here in Slovenia, so maybe I understand things wrong?