Saw this recently from 216.201.9.135:
GET /robots.txt Mozilla/4.0 (compatible; fluid/0.0; +http://www.leak.info/bot.html)
IP maps to what looks like a small-scale hoster / provider of some sort:
216-201-9-135.microtronixesolutions.com
INDEPENDENTSFIBERNETWORK - Com Net, Inc.
Ohio, Ottoville
Did not grab anything beyond robots file (would have been allowed to according to robot rules).