Jochen F. Rick wrote:
> Are there any keywords they are using? like viagra? hot asian women? etc? 
> that you want me to ban?

Hi Jochen,

you won't be able to keep up that way.

Here's a system that has been effective for me for a while:

- accept unrestricted edits from identified users, who have clicked once 
to set a (permanent) username cookie

- block edits by anonymous users which contain more than N occurrences 
of "http://", where N is 0, 1, or whatever. Give some kind of indication 
so that the legitimate anonymous user knows what happened and how to 
become identified to remove the restriction. Trade-off - if you make 
this hurdle too low the spammers may jump it.