There's no reason why these guys -- WHOIS: Kaspersky Labs; company: Kaspersky Lab; site: kaspersky.com -- need to visit, let alone re-visit, a very small, low-traffic site with a 25-sq. mile geo-target of interest that's 5,233 miles away from Moscow:
Pre-block, one hit to / html; no auxiliary files; of course, no robots.txt:
81.176.230.39 - - [0n/Jul/2011:15:58:02 -0700] "GET / HTTP/1.1" 200 4670 "-" "Mozilla/5.0 (tarakas)"
Post-block, 30 days later:
81.176.230.40 - - [0n/Aug/2011:06:59:25 -0700] "GET / HTTP/1.1" 403 866 "-" "Mozilla/5.0 (tarakas)"
BotNyet, comrades.