That's missing the point. I don't care about honest competition. I just don't think someone should be able to leverage my infrastructure to re-sell my product.

This leaves me no control over the selling process. The front-end does whatever it likes.

Suppose they make a claim that the product has awesome feature xyz. They then take the money, hit my website, I take the order and ship it. The customer opens the box, finds out feature xyz doesn't exist, then finds the support contact info in the box. They call me and ask about feature xyz.

Bah.

Update neilwatson: Yes, in some cases it is fraud, and legal action is taken. The reason for the post was to find ideas to do whatever I can to discourage it in the first place. I'd rather make it hard to do than wait for it happen and take legal action.