One solution may be to reduce the content in the HTML. That can be done by using graphics for much of the content. This seems to be a growing trend on sites I've visited recently. It requires some creative work for search engine submission, but if the important text is in a graphic, it is possibly less vulnerable to theft, particularly if the graphic contains the a proper copyright notice. You can also encode data in the graphic using a process called steganography. See this site for some tools to help you out. I could not find a CPAN module for this.

If you have encoded data in the image, and it is stolen, you should be able to use a decoding tool to show that it is indeed your image. Combined with a copyright embossed on the image, you are probably much safer.

(You could also display your catalog as PDF, but there may be issues regarding plug-ins, load time, etc.)

HTH, --traveler