Well, then don't blame the company for the terminal stupidity of a teenager. Maybe blame the shop that sold the stuff, either for selling it to him, or not taking the necessary care about 18+ items, if he just stole it.
At 14, I guarantee you did stupid shit. And at 14, I'm sure you didn't expect the grocery store to sell you food with fatal amounts of capsaicin in it.
It was a dumb idea, sure, but he was a fucking child and likely didn't think it would be legitimately dangerous.