I don't much care for spam, that should be fairly evident by my occasional rantings. I got another bit today offering really cheap domain registrations and, like always, I went and checked out the site. they didn't post an email address but they did have a contact form that didn't obscure how or what it submitted very well. So I did what any good natured, mild mannered web developer would do - I wrote a self calling page that submits a complaint from a random address every 3.5 seconds.
Even if twenty five thousand complaint emails a day doesn't change their marketing tactics, it's at least cathartic to send them.