This IT pilot fish shells out for a name-brand digital camera, and since he runs his own email system, he puts a unique email address on the warranty registration card when he fills it out.

“I also checked the ‘I don’t want you to share my email address’ box,” says fish. “Imagine my surprise when I started getting email at that address from a number of different companies that seemed to think I fit the demographics that defined ‘their customers,’ including Volvo and the NRA.

“Knowing their source of this email address, I contacted the camera company. And I kept contacting them every time I got one of these emails. I didn’t just send to customer service, I started digging up email addresses for company executives.

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