The most advanced protection against sploggers and spam users registration, is fully WordPress,WordPress MU ,BuddyPress and bbPress 2.0 compatible
I had to fight installing WangGuard.
Indeed there was something
wrong in creating new database tables!
I followed the FAQ when it says:
"Please, copy the next code and use phpMyadmin or similar software for create WangGuard tables."
But when I run the query I got error:
"Unknown character set: 'latin1_swedish_ci'"
Eventually I solved the problem removing all the lines:
"DEFAULT CHARACTER SET latin1_swedish_ci"
and the query properly created the new database tables!
Now I can save settings and all is working very well, no more sploggers!!!
I have been using Akismet with Wanguard. They are working great together and stop 90% spam.