I know but with Sourcebans I can uban people and ban them by that.
Might just be me, but that sentence made no sense.
With JUST Uban, you can ban someone on a server, and say you had 12 servers.. They would get automatically banned on all servers with uban installed (Providing they all use the same database/table)
Sourcebans: Yeah its a nice tool, however do not think it supports Gmod, however saying that I have seen some of the more popular servers use Sourcebans, could be wrong though.
I might look into this, as although i like Uban too much already (Generally love MySQL and when this released i think i had a little orgasm.) Sourcebans is a very powerful tool and would be a great addition to any server.
I'll let you know if I have any luck, Or find out anything relevant.