A: No need for proxies with google but I would always recommend something just incase, a vpn would be fine as well. Yahoo can be multithreaded so very fast if you plan to scrape it with more threads you would want to have proxies. Single threaded it is probably fine and also a VPN would be ok. When we do the email scrape we do look for a facebook page, instagram page, and twitter page when scraping the business website. We do not however go to facebook.com and scrape anything from there.