Honest question: how many people do you believe end their life like this because of the recommendation vs actually researching it before and they atr just buyin

Honest question: how many people do you believe end their life like this because of the recommendation vs actually researching it before and they atr just buying the stuff? If it's because of the reco: how do we ensure that we ban all other possible lethal combos? Disable recommendations? Ban certain things?