In my younger days of making sharewares, my way to find pirates was a lot easier... If the serial had been stolen, I would crash the app after a few hours of us

In my younger days of making sharewares, my way to find pirates was a lot easier... If the serial had been stolen, I would crash the app after a few hours of use, randomly, with a generic message but a very, very specific error code. Then I'd wait for the support emails to come in with people complaining about that crash/error... Typical how the pirate support requests were always the most rude and impolite :-)