Student Arrested in Taiwan for using SDR and Handheld Radios to Halt Four High Speed Trains with TETRA Hack

No, they're doing it right by arresting him. There are ways he could publish his finding and have his share of fame in a way that would help them to get fixed and doesn't disrupt the lives of so many people

the student transmitted a "General Alarm" (GA) signal, the highest-priority TETRA alert, which automatically instructs trains in the area to switch to manual emergency braking. Four trains were stopped for 48 minutes.

I have to disagree. That sounds pretty disruptive and costly for a lot of people. I would prefer not to reward causing large disruptions in the lives of so many people to no point but for the lulz.

He is currently out on NT$100,000 (3,200 USD) bail and faces up to ten years under Taiwan's Railway Act and Criminal Code, with an unconvincing "had it in my pocket and accidentally pressed the button" defense.

I think that is a fairly reasonable range for sentencing, because of the potential and actual impacts on society. For a first offense, though, I would support a suspended or very short actual sentence.