This visit it did ask for robots.txt, but already banned by UA.
koan
10:23 am on Apr 1, 2009 (gmt 0)
It went through my whole site with an interval of 1-2 seconds per page, which is very aggressive, with the user-agent "Shelob (shelob@gmx.net)". No web site, no info, nothing. It doesn't sound very legit to me.