A few people have contacted me about downloading troubles, which I've addressed to their complete satisfaction. Most often, the difficulty lay in my own hosting, and did not concern my contributors at all.
I do make sure all contributors are real; some I've known for quite some time...like one in particular.
I don't know what I can tell you about the spammer, other than to take all measures you can against it. Report it to Paypal, use filters, whatever it takes!
Please tell me more about your download problems by contacting me at Dan(at)WAHumor.com and I'll fix you up ASAP.