Winter Field Day and generators

With Winter Field Day coming up some radio operators may be running your stations using gas/petrol generators. While you can just drop the generator down outside and start it up you really should, for safety, have a ground rod set into the earth.
Although the system below does have a ground rod placed in the earth I'll leave it to you to discovery why it is not going to be very effective ...

Not the right way to ground a generator system, "A" for effort though.