CleanTalk is highly effective!

Along with many others already reporting good results, I also had to turn off registrations to my WordPress sites due to the onslaught of crap/bogus/spamster sign ups—-what do these people hope to achieve with their stupid spam activities anyway, it is appalling!
After installing Clean Talk it all just came to a stop – I can now run my sites the way i want to, not just defending them from the tsunami of spam hell.