Exactly. I am very much on the side of "If it's publicly available info, it's free to access and repackage" but a lot of companies and judges feel otherwise.

Can you list some specific examples of companies to whom this pertains?

By that I mean companies who think their data shouldn't be publicly available and also fail to place a no-crawl flag in their robots.txt.

Well, a robots.txt (much like an implicit TOS/EULA that nobody ever sees nor agrees to) isn't exactly legally binding.

Yelp, LinkedIn, and Craigslist are examples that have taken legal action recently against other entities scraping and re-purposing the data.