Referrer spam!!!!

[kronobotz.com]

How do you deal with it?  I had used this format in my .htaccess file: 

## Tag our known referrer spammers
SetEnvIfNoCase Referer “.*.referrerspammerdomain.com” ReferrerSpam
(Loads more here)
## Block our known referrer spammers
order deny,allow
deny from env=ReferrerSpam

I found the above way of doing it, online in an article (I'm not too much expert on these matters so please go slow with me).  This seemed to work for a while.  But today they're all showing back up. 

How do you keep them off your stats?

[TechGeek]

I use gostats and it divides the traffic into different sections so I can see where the real visitors come from.