Old UA: mozilla
New UA: Mozilla/5.0 (Windows; U; Windows NT 6.1; fr; rv:1.9.2.9) Gecko/20100824 Firefox/3.6.9 GTB7.1
IP: 88.190.11.nnn
rDNS: sd-nnnnn.dedibox.fr
robots.txt: No
First visited me in July asked for the root page and then robots.txt and then went wild with 374 more requests in 4 minutes, of those 227 were requests where it had concatenated sub folders and items in the root folders together to ask for things that don't exist
This time it only requested a single page but no robots.txt.
So a bit better behaved, but still a FAIL as no robots.txt or a UA declaring itself.