If you don't like that, there's a simple solution:
- Go to http://semalt.com/project_crawler.php
- Add your URLs in the form provided at the bottom of the page
- Click the remove button.
One note: if you use subdomains (eg: blog.mydomain.com and www.mydomain.com) you will need to enter each of those domains in the form - use the enter key to go to the next line.
I used the form a week ago. Sure enough, Semalt has dropped off my stats (as well as all these bizarre instant views from a number countries around the world). So as far as I can tell, this isn't spambait, just a group of folks in the Ukraine trying to make a living - too bad their website isn't a bit more user friendly. I had to spend more time searching for the above link than I liked.