[BD]

I think, rather than kicking, it would be better to use the same function as the game uses in objective mode in TDM mode. You can't spectate someone who isn't on your team. I wonder if it's possible to change that, though...

Unless, of course, you play in DM mode. Then I guess kicking is the best solution. To do that, just set the inactive kick to something lower than 5. That way, if you spectate for more than the number you set it as, you get kicked. Spectator kick or whatever just moves a player to spectator mode after however many seconds have passed without them moving, typing, or doing anything.