Maybe, maybe not. The op posed the question so he is concerned. And should be IMO
Palytoxin is the worst but isn't the only toxic hazard found in saltwater aquariums. A quick google search on coral toxins will give you an idea.
Most of you who haven't had issues have been fortunate and probably take it for granted. I know a reefer who ended up in the hospital for taking a chance putting hands in tank with open wounds.
Reefs are beautiful to watch but use caution as there are hidden dangers.
avoid zoas, palys, or any button polyp for your son's tank.