If I had a site that was scrape-worthy, I wouldn't care about it if the people were respectful about it (wait a second or to in between requests, don't hammer my server).

From the business side, I could see them getting a bit grumpy about it, but if it's publicly available information, and there's nothing in their TOS about it, I don't see how they could do anything about it - again, unless you're being a dick with your scraper.

Does anyone know off the top of their head if there are any relevant court cases dealing with scraping?