Is this Hertz? Somehow Hertz in Mexico decided to add my email address to their mailing list, and I tried to complain to every level of Hertz to get them to stop. Their hosters didn't care, their upstream didn't care.

I decided to download larger files from their web site a few tens of millions of times, which I think cost them a few hundred dollars. Unethical? Perhaps, but I'm not the kind of person who just accepts that companies are too large to have humans that can communicate and that I should just accept their harassment.

It worked, though. I finally got a response from Hertz saying they were going to "get to the bottom of it", and I finally stopped getting their spam.