Well, luckily, not everyone knows how to do this.Dumb question, since I'm new here, but how are you going to enforce this? Banning an IP address won't work anymore thanks to the advent of VPNs.
But, I'll pass this up to admin to answer.
Though, as Ptar wrote,
However, usually a formerly banned member betrays themselves one way, or another.We'll do the best we can.
Also, the s/w allows for admin to check IP location. And, if the location is the same as a previously banned member, there's a good bet, that it's the same guy, under a different name.
So, when we notice that (or, it's Reported), we got something to use.
@admin
Hey Boss. Any idea on how this will work here?