Mr.HuckStill is this really necessary and does it actually help keep spam down?
Yes, yes it is. Spambuster came abouts in like 2005 when kids (like me) would spam a forum for fun, we thought it was hilarious to fill an entire page with one thread. Kids would also spam cults to get their post counts up (like me, got like 2000 deleted). They put in spam buster to stop this and it worked lol. It would happen again if we turned it off too. I rarely encounter it, you have to be posting like a maniac to get two in 20 sec.