I'm not suggesting that these people shouldn't be charged with some sort of crime, regardless of whether or not they can prove that Eichenwald had a seizure (which I have my doubts about). There's a precedent set that things like lasers shined at pilots eyes are gone after regardless of whether or not it causes a crash.
However, while not condoning these peoples' alleged actions, I can understand why this guy attracts a lot of derision online. Eichenwald appears to be a really scummy character. Google his name and "child p*rn" just for starters. There appears to be a lot of wild stuff there about a big time shady payoff to a site he was "researching".
He also recently appears to be becoming mentally unhinged. He recently went on Tucker Carlson's show and gave a serious repeated accusation about Trump being hospitalized in a mental institution that he later claimed was a joke.
Should be a fascinating legal case to follow if it goes to trial.