Stefaan Lippens' webface

The logs of my (drupal powered) website show a lot of referer spam. Some time ago I had this statistics page which contained a listing of the last 10 pages my site's visitors came from (aka referers). Soon spambots found out and spammed this list. I made the list invisible for anonymous visitors, but nevertheless spambots stil target my site (less frequent than when the list was visible, however), polute my stats, use bandwidth, use processing power and kill those cute little puppies. Now I went a bit further to block those dirty spambots ...