I tried to add " * " as exempt to the channel list.
But it didn't work too.
Maybe there is another way - except that * - to mark ALL channels as exclude-channel?
Setting cl_chans to an invalid channel will effectively stop the script from setting limits on your channel, and if you're going to do that you may as well increase the cl_timer setting to around 60 to reduce the script's impact on the bots' efficiency (although it's probably miminal anyway).
I use unloadtcl.tcl to dynamically unload tcls although I have never used it unload a netbots component before, this doesnt require a restart although it wont always unload a tcl properly meaning a restart anyway but does usually work.