Ban Triggers For Forums

[xpubstargamingx]

I know most of the time this is something depending on what kind of issues you are having with Bots or other Trolls on your individual forums, but what are some Ban Triggers that you have found help keep unwanted people off of your fourms or registering for your forums.

I am not talking about Mods for SMF I mean more along the lines of the following...

Banned entity - *@yahoo.co.uk ... *@mail.ru ... *@x.bigpurses.org

Or any other triggers you can think of!

[xpubstargamingx]

Any suggestions?

[vbgamer45]

*.cn *.ru *.in