The only hope I know of is Akismet
http://akismet.com/blog/2006/06/phpbb/
If someone would made a plugin similar to this one.
Perhaps there is some free service similar to Akismet. However if the plugin users will use the free apikey from wordpress it is up to them.
http://akismet.com/blog/2006/06/phpbb/
If someone would made a plugin similar to this one.
Perhaps there is some free service similar to Akismet. However if the plugin users will use the free apikey from wordpress it is up to them.