It can be more of a judgement on society if this person ends up in jail, while IoT makers keep making hefty profits being rewarded for their negligence, and ISPs keep making profits being rewarded for lying to their customers when shit happens and causing more damage than he ever could overall.
Masked comic book vigilantes aren't ever going to be a reality on the mean non-virtual streets of cities but on the Internet it seems we're confronted with something pretty much equivalent.
So here can consult all the old issue of Marvel and DC for a compendium of moral dilemmas and result.