i thought the first question that needs to be answered is "why block?" if you simply don't want competitors to easily suck in addresses and prices then either don't list prices or put the prices as gifs, then at least it will take manual labor to view the pages and write down the prices. You could potentially be also restricting legitimate (computer savvy) buyers, who do their homework. A fairly hard to work around page would consist of a session, and the session being modified slightly each time a user comes to your page...and the session must follow the proper path to succeed. this however, would be a pain to frequent users of your site, as things would look different each time they try to do the same thing (get some listings) Perhaps you alarmed the non-tech people in your company too much when you discovered harvesters in your logs. i certainly would not worry about it unless bandwitdth was being adveresely affected.