It seems that it is not a simple issue. It would be a good idea to have a Cod4x server with and another one without bots. Don't know whether it's possible or not, or even feasible. But it would be a good way to see if there is enough traffic on the bot server.
The other day, I joined the game, and just after a player trigged a nuke. He had not enough kills to get it. So, I asked if it was a package. He answered no, I spawn killed the bots. Oops! The other players can't know since you can't see how many bots were killed by a player from the scoreboard. Anyway, spawn killing the bots is quite a different game than the one we played so far.
I want to take this opportunity to thank iBoomboom and others who contributed to putting online the CoD4x server, which is really great