In addition, some Webmasters may block entire class A networks because their site will not benefit from allowing access from those IP address ranges. For example, some sites may not benefit from out-of-country traffic at all, but might suffer site-scraping from other countries. I'm not suggesting or condemning such a wide-reaching access restriction, just mentioning it; The choice is up to the individual Webmaster.

Many of these solutions have been discussed in the technical/scripting forums here. There are also many Web sites about IP address and open-proxy blacklisting. These methods can help to reduce the number of successful scrapes, and thereby reduce your legal costs, time spent on DMCA filings, worry, etc. None are foolproof, but they can discourage those who might take your site for easy prey.

Jim