Thank you, friends, for your replies!
First I though that it could be a stranded spider, but I never put this site to any Russian searchy.
Of stealing the content - I feel fine, because this stuff is free. I'm going to put a downloadable archive soon.
My main concern -- sorry, it may sound strange; I have minimal skills in this area -- is that the server, being affected by such frequent hits, may go nuts and send outside any kind of protected info.
Oh, thouse Russians! But who I am? 🙂