i am 100% agree with you .
I want to know how I can ban .ru domains or mail.ru or gawab.com and all of these domains that spam keeps coming from.
Maybe it's just me, but could you be clearer about what you want to do?
Do you want to block spammers from registering on your forum?
Do you want stop spammy forum posts?
Specifically, do you mean:
(a) you have email verification turned on, and you want to ban users who attempt to register using *ru email addresses (or who supply *ru web addresses) when they register?
(b) you want to ban users who attempt to register from Russia or any other specific IP address range or domain entirely?
(c) you want to block posts that contain links to *ru or other spammy sites?
I am presuming (a), but it is hard to tell.