KWo said that you would have to hack into steam or the game or something and he doesn't want to do that. I agree with you that it should have a random latency.
Expanding on your topic of random bot adding, I think there should be a system of random bot adding and bot leaving. The number of bots can go below the maxbots, but not above it.
Also, you might want to read my post about custom map configs for bots to make them act accordingly on each map, just like a human would. the post is here:
http://forums.bots-united.com/showthread.php?t=6001