Sad story. The lesson should be to tell people clearly (and emphasize too!) that it's completely their decision for what they do with their money, whether you do this online or in real life.
I understood this as a very important lesson, and it is important that it happened at a time when the price of BTC was around $200, and I could afford to go in the direction of compensating someone for the damage caused by insufficient knowledge and insufficient awareness of how important security is when it comes to crypto. Back then, HWs weren't as popular as they are today, and a hot wallet on a computer used for everything was an ideal target for some malware that came into possession of seed stored on PC.