New to me...
81.187.72.xxx - - [16/Feb/2015] "GET /randompage.htm HTTP/1.1" 403 238 "-" "OrgProbe/0.9.4 (+http://www.blocked.org.uk)"
Purports to be an anti-censorship campaigner bot.
It fires off calls to the same page via a dozen IPs within seconds, from what look like "infected" machines on unblocked mostly UK ISPs.
You have been warned Friends :)
PS. Unrelated: I appear to have discovered (and blocked) +all+ current Sinobots pestering my own domains. +None+ have got in for months now:) Unless they have merely paused, resting for the imminent Gong Xi Fa Chai mayhem?