There were urban legends back in the 80s and 90s about tourists in beach resort cities hooking up with attractive women in bars and discos, going back to their apartments or hotel rooms to keep drinking, passing out, then waking up next day... without the corneas of their eyes! Completely blind!
A friend of mine many many years ago met a girl on a dating site and mentioned it to his mom. She announced that it was a kidney harvesting scam and would not let him go on the date unless he agreed to check in with her afterwards. During the date she texted him multiple times to watch his drink and make sure he doesn't get his kidneys harvested. When he didn't respond fast enough she called me and made me promise I would go and rescue him if it happened. After the date she wouldn't accept text messages that everything was fine. He had to call her and make sure that she could hear his voice. She also called me again and asked me to drop by his apartment to make sure he was there.