If I need data from a site, it either a) willingly publishes them using an API (which is more common than it appears - but not always free), or b) does not permit scraping.
I have yet to see a useful site which does not fall into one of these categories. In any case, either I don't need to scrape, or I am prohibited to do so; I have better things to do than haggling with lawyers over content misuse.