So because their children misused or failed to follow recommended or required or mandated safety precautions and the use of respirators, they are suing................the manufacturer? Were they employed by a licensed contractor, the actual responsible party or did they blow off the rules because wearing a respirator, gloves a Tyvek suit are a pain man.
Our company had a contract to reseal the sewage tanks at Dana Point State Beach, CA. and not a one of would have dared blow off on safety equipment 15 feet down in volatile fumes. Sometimes when you break the rules you pay the ultimate price.
Typical, blame the manufacturer, the chemical and the government instead of accepting their sons made the choice to act foolishly.