The article said the default admin password wasn’t changed. Thats not security theater that’s a legit goof. Why so cynical?
"The man who made the devices said there’s little someone inside could actually do with a hacked Securebook. They’d need to fashion a USB port, be able to install another operating system, and get access to a docking station, said Jeremy Schwartz, Justice Tech president. Even when the devices are docked, they’re not connected to the wider internet. "
Sure, they can commit crimes with it.
But prisons obviously don't care about their charges committing crimes or they would take serious measures to prevent violence.