UA: Opera/9.80 (Windows NT 5.1; U; ru) Presto/2.6.30 Version/10.60
robots.txt: No
IP: 178.187.nnn.nnn (a wide range of IP addresses)
Rdns: 178.187.nnn-nnn.xdsl.ab.ru
Has a habit of getting all the resources of a page (.gif, .js) without actually fetching the page that they are in first, which is the clue that led me to label it a bot.