I think my arms dealer provides a much clearer example of facts removed from tech where people in HN are understandably defensive.
The law doesn’t require a seller of goods/services to investigate a buyers intent, but the law does create liability if the seller knew or should have known the buyer intended to use the good/service in the commission of a crime.
So in the case of an arms dealer if the buyer uses the gun in a crime, the arms dealer is only liable if they knew or should have known, but the law isn’t requiring the seller investigate (but if facts tend to show the buyer was discussing using the gun for crime xyz to the seller, then yes the seller could be liable).
I think this is good, others may disagree and say sellers should be able to sell goods/services where they know the buyer intends to use the same in commission of a crime...but the investigation is beyond the legal scope of what is required by law and I don’t think anyone is suggested that become the law.