I wish my gmail account only got the emails for 5 strangers. It's more like 50. It is indeed incredibly hard to get these errors fixed, even when they're fairly serious. Like the guy working at a US army base who managed to sign up for their internal newsletter using my address, or the married couple who gave various financial institutions my email address when buying their first home a few years ago. I'm still getting their financial information occasionally, despite trying to tell the senders that they have the wrong address.
I had this where I'd be getting a "statement notification" from some guy's bank every month - no financial information in the email, but you also couldn't unsubscribe without logging into the online banking thingie. In the end I googled the guy's name (it was in the email), found the one with a really similar email address to mine and let him know :)
