I’m testing a spambot blocker courtesy of Augusto over at Spanish SEO. So if you can’t read this blog post, please let me know asap 
It displays a nice big STOLEN sign, as seen on the right here, to mess with their splog display.
You should be able to block bots via robot.txt instructions, but spammers aren’t known for following rules. This solution blocks the bold bots at the Apache httpd level using .htaccess instructions. See Augusto’s spambot blocker article for more information.