Web scaring is an "arms race". I was asked this weekend by a client, who found a Python scraping library for their sit on Github; how to avoid scraping.

Either remove your content from the internet or put up with it like we do spam.

The client linked this: http://stackoverflow.com/questions/3161548/how-do-i-prevent-...

But the problem with all these approaches, is the arms race problem. These solutions take developer time, and they can affect end-users. The army of scrapers can easily undo your efforts in short order making alot of these approaches an effort in futility.