I'm going to have to go with Turbo and Mr. Websites on this one. Beating him at a pissing match and "teaching him a lesson" might feel good, but what does it actually accomplish for you besides valuable time wasted?
Other people posted some great ways to kill the spam. Problem solved.
It's badass that a beast like Shady is here to help you (+rep btw)...but there's also a small chance that the punk has l33t haxor friends too. Hell, even Eli had some trouble a few months ago.