Yeah, it drives me insane, once someone used my email to sign-up on eBay and started buying sex toys. Can't believe eBay didn't do email verification. I was at work and started getting emails like congratulations, your dildo is on its way, with pictures.
I got emails about the death of my mother because a guy had my email address printed on his cards by mistake. She was pretty much alive and living with me. It would scare the hell out of me if it happened again now that we are further apart.