to get this out of the way: if he lied, that is a completely different subject. nor is it for us to judge. nor am i interested in speculating.
> It's not reasonable to introduce additional first amendment restrictions or award damages in response to targeted prank tweets by internet trolls.
the medium is irrelevant. the first amendment does not cover all forms of expression and speech. period, man.
> Why wouldn't he take precautions if he knew using a computer could cause a seizure?
it's like saying, why cross the street if you know you can get hit by a car? obviously there is a statistical difference, but that would suggest a slippery slope. other posters in this thread have given less extreme examples of this spectrum.
you have to look at it from the perspective of intent.
honest question: if yesterday i'd asked you "some guy maliciously and willfully gave another guy a seizure, should he be punished?". would you respond, "depends, how'd he do it?"