When I had an SRB2 tournament in mind, and some episode of a cartoon as well, I had this idea:
How about a feature that temporarily disables the playability of certain players in a Match netgame? Like, if the server types in the console DISABLE NAMEHERE, NAMEHERE is able to move around the entire stage, yet he won't be able to throw rings. If another player decides to shoot NAMEHERE, the other player won't be able to gain points. If NAMEHERE does anything to lose his points (Like get killed or fall in a pit), the player doesn't lose any points
To reverse the effect, the server would have to type in the console ENABLE NAMEHERE
Something even better would be, if the server types DISABLE NAMEHERE, NAMEHERE wouldn't even be visible to another player; it's like his sprite isn't drawn and he isn't vulnerable to the shooting rings, though player control would still be functional so NAMEHERE could still see things through CHASECAM 0 or some equivalent
It would be really helpful when someone comes in just to watch, not play, and in situations where most of the players of a tournament can't play the current match.