Mr. Laser Beam, I actually agree with Nerys Myk on this particular point. I think the use of neuralyzers and generally keeping total secrecy from the rest of humanity is problematic as heck even without fanfic-ing about in-universe health risks the movies haven't even hinted at.
Actually, yes, it was hinted at, in the first film.
Agent J said:But if you go in there, you're gonna lay your Jack Webb on her, start flashing your brain-ray all in her face. You're gonna wind up giving her leukemia or something.
Sure, it was basically just a throwaway line, but it WAS a hint.