I would LOVE to see this added. I hate when I mute someone and they leave and come back and I have to mute them AGAIN.
How this would work is like the ban database. You mute someone and their IP or name gets stored in a txt file.
There are some flaws/problems with this, however. With saving the name, the player could easily change their name and with the IP, it effects all of those from that IP that also play on AoS, on that server.