when i had a css server, mani_admin or whatever it was called had a radio script where each player types !rock, !club or whatever to get their music up, they close the window which pops up and then it continues playing. This was great.
If you could do something like that, but have an extra command which is admin only, (!rockall, !cluball etc) which basically does the command on all client's consoles, thaat would be good.