i think that's ridiculous. I've had those palys many times in many tanks and nothing like that happened. The paly toxin is a real thing, but all of them have that as far as i know. They won't "sting" you though. you have to cut one open and it squirt you or some times they squirt fluid when you pull them out of the tank. Eye protection is the defense against that. If your skin is very sensitive you might have a reaction from excessive handling of them. In that case, wear gloves when fragging them.