Actually the minbots feature is quite usefull if you are using the bots on a dedicated server to bring in traffic (i know its evil). but what i like to do is set it up so that if there are always at least a mininum of 16 slots used (humans + bots). Then, as more humans join the bots automatically leave. When there are 16 humans all of the bots are gone.

The correct setting for this example would be:

minbots 0
maxbots 16

Several other bot implementations have this feature including foxbot for TFC and podbot.

Thanks for the help!

-KA