... if I get the following message when accessing your weblog:
Sorry, your IP address is listed in the local realtime blackhole list. You may not enter this site.
then you have done something wrong by definition. Blogs are meant as a means of communication - and installing silly communication preventers just because you don't want links in your referrer log that come from spammers is simply ridiculous. In that case, you might as well take your blog completely off the network.