Flat towing

I'm sure you can, but why would it be easier to disconnect a battery rather than remove a fuse?

Why would the radio discharge the battery when towing? Can't you turn the radio off? Do you tow with the key on?

#1 The fuse is not easy to get to and adding a battery disconnect is easy To tow four down you must put the ignition key in the ACC position to allow the steering wheel to be unlocked , even with the radio off there is still power to it for clock and station memory and there maybe other power users also.

I've never seen a car towed with the keys in the ignition to be honest I've seen them turn it to acc to unlock the wheel to hook it up, but usually they lock the wheel after it's hooked up.

You cannot tow a car with all four wheels on the ground with the steering wheel locked. When you put the key in the ACC position to unlock the steering wheel you cannot remove the key without locking the steering wheel again.