I've noticed a worrying problem, is that if you register a channel and join ChanServ into it, and type !drop the channel will be dropped, which is very bad (just imagine a nutter for sake, typing !drop this would make your channels revert to unregistered and you'd have to go through the registration process all over again.
This to me can be easily fixed, if you had another config option ProhibitedFantasyCommands "DROP REGISTER" where users could stop certain fantasy commands working on the channel.
By definition, any Channel Registration/Drop commands should never be allowed as Fantasy for the very reason they could be typed and irreversible action can take place.
This could also be applied to !TOPIC as well, as that would wipe out the channel topic in the blink of an eye.
Please consider adding this change, Thanks.