Do not protect your website from scraping (part 1, technology barriers)
Gajus Kuizinas

Nice article! I have a question about the layout though — if the company that’d like to block scraping would use a script that randomizes the CSS classes used in the HTML (but would be the same random string as in the CSS file) each time the site is loaded — how hard would it make scraping? I think you could fall back to using “inside the 4th div and then inside the 2nd span is the price” instead of using CSS selectors, so probably wouldn’t really affect it…