It is a few days that I have installed Disqus wordpress plugin and I am quite impressed by it. I am receiving no more spam/bot messages through Disqus commenting system , but still bots are able to send spam to wordpress own commenting system ! so I was looking for a solution to disable wordpress comments and I found the following link :
http://beta.beantin.se/wordpress-comment-spam-disqus/
it provides 2 solutions to get rid of wordpress commenting system , but I prefer the neat one ! delete the whole thing ! lol
simply delete wp-comments-post.php from your wordpress root installation folder. then bots can go to hell 😉
Filter out comments and empty lines from config files