People need to be watching this guy very closely. Because someone who builds mind-control devices in his free time isn't too far away from deciding to use them.
I mean, most scientists wouldn't even consider building something like that, not even once.
This guy did it twice.
(That we know of.)
And he's not even being paid to do it, or being forced to by a supervillain.
This guy chose to build those devices, for himself.
But I guess we're supposed to believe that he had no intention of using them.
I mean, surely someone would build such dangerous devices purely out of curiosity, right? /s
Honestly, while the guy may not be doing anything technically illegal, he is certainly doing stuff that's highly unethical.
And I don't believe there isn't any ulterior motive for making them.
I mean, would you?