I've had lots of fun with spammers. Back before it was illegal, one company I worked for used all of their old servers and a dummy domain to run DOS attacks on any host that sent spam out. In fact, there were hundreds of us across the country that only communicated via BBS to coordinate said attacks. We had several providers contact us to plead with us to stop. The assaults only stopped if they banned certain accounts. We also did the same thing to overseas domains and had many of them outright banned. Then they started making DOS illegal for anyone (and basically any retaliation). That is when spam started to explode.
Does sending a reply of junk info every 10 seconds constitute a DoS attack? If I found one that was a simple form, I would fill the spots with random crap and cursing and let it run for hours.
I love caller ID. I sometimes answer."911, Please, state the nature of you emergency!" Then I try to make them stay on the line while drilling them for information and explaining the penalties for their actions. Or I answer in spanish, then tell them I don't speak spanish. Anyone remember party lines?
"Does sending a reply of junk info every 10 seconds constitute a DoS attack?"
No. Your email provider may complain though and I think (not sure if this is applicable anymore) gmail and yahoo, will delay your message if they are going out too fast. Most spammers have their accounts set to reject all reply's anyway.