[TehCorwiz]

An Android smart phone and SDR dongle with antenna will fit in your pocket easily. No construction required. Apps already on the Android app store.

Here's the thing about easier; A determined car thief probably has access to purpose built devices and given the financial incentive will probably put more time into solving this "problem" than an amateur. I would argue that knowing this attack is possible is more than half way there because it opens up avenues of research.

[defparam]

It arguably would have been smarter for FZ to show a video using an SDR dongle/android phone than hobbyist antenna construction if they were trying to drive home the point of simplicity.

Advocating on behalf of the devil: ease of access for determined attackers is not the concern. It's more the undetermined attackers they are worrying about enabling. (again I do not agree with law as the solution to this)

[TehCorwiz]

That's true, and I agree to a point. But, I think they wanted to nail the "You don't even need a dongle" part of it. Because none of this is enabled by Flipper or a dongle. A handful of components you can get from a broken radio suffice. There's nothing magical or beyond reach making this attack possible. You don't need custom chips, or a long logistics pipeline to enable it. You don't even need a company to produce anything specific. The from-scratch demo they posted hammers home that working from nothing you can do this in an afternoon with tools you can get at Walmart and it's well within a high school student's abilities.