UA: Mozilla/5.0/Nutch-1.6 (Crawlerbot run by Yelp Inc; yelpbot at yelp dot com)
robots.txt: Yes
Host: AWS
54.160.0.0/11
54.160.0.0 - 54.191.255.255
Since I block Nutch & AWS, but value Yelp as a business trust factor (especially w/ Bing) I'll poke yet another hole.