First one is problem because it brings no traffic back and occasionally DDoSes the site Second one is problem because it DDoSes the site. "Just" queries for hu

First one is problem because it brings no traffic back and occasionally DDoSes the site Second one is problem because it DDoSes the site. "Just" queries for hundred thousand people (if you happened to be good source for that bit of knowledge) that don't bring actual people to your site is also a problem