Simple practice. If you intend to police and enforce the non-use of particular words, or psuedo-words, in an online game, that database should tie into the one for appropriate names or idents used in the game.
If it makes it through the acceptable ident filters, it should not provoke a mute automatically.
Now, if this was somehow a player initiated mute..... that's more problematical, but as I rarely run into such problems that bother me, I'm not too certain how the game handles those incidents.