I've seen this guy come in pretty often. And I'm pretty sure that it's a thief.
IP: 184.108.40.206 Referrer: none User Agent: Googlebot/1.0
IP: 220.127.116.11 Referrer: none User Agent: Googlebot/1.0
IP: 18.104.22.168 Referrer: none User Agent: Googlebot/1.0
Man, if this is a thief... might as well use the updated Googlebot!!!!! I don't think Google uses this bot anymore!!! For those of you who think it's an actual spider from an SE, let me know on your thoughts. Thanks.
If you have a number of requests in the logs like this it might be worth contacting the UUNET UK abuse team (abuse at uk.uu.net), as these IP's are their hosts.
Clueless effort, definitely. The only problem I have with blocking this type of IP though is it being dial up. As a UK host I'd not want to block it, although I'd also not appreciate seeing bandwidth being wasted with this sort of request.
UUNET provide our backbone, and they are tight on network security and abuse issues. I can't see them liking this.