I agree that there's a problem with the author's messaging, but I think the problem is with this first as a tool for "when your house gets raided by the police..."
There are all kinds of reasons to encrypt your data. Some of them involve obstructing justice, some involve protecting oneself from "justice," but there are many others. If you have a good reason to encrypt, then you probably have good reasons to protect your system using a program like this.
Leaving aside the State, and more mundane robberies, some people have good reasons to be concerned about industrial espionage[1]. Tools like this seem like a good way to counter that.
[1] http://www.infoworld.com/article/2615610/data-security/when-...
Given the number of raids that happen based on false CI information, typoed street addresses, or government overreach... it's not clear that the program is meant to be used primarily for that.
The police aren't our friends. They don't protect us individually or collectively. Often we need to be protected from them. Any tool that can help with that is a good thing.
At that point, two cops pulled in behind me and thought I was passing drugs. They looked around on the ground and patted me down and when they found nothing, they trump up some charges and said I indecently exposed myself. When the case went to court, the cops were caught lying. They tried to tell the judge I flashed some girls in a convertible but video showed they lied through their teeth.
So I have my own personal story but don't listen to me, hear what this professor and an ex-cop have to say about talking to the police.
Read into that any double meaning you like.
You mean, like a lawyer?