Not only a bad idea, but it wouldn't take long to freeze the whole system. I don't want the fans to run full-time, that would make fuel economy suffer and could lead to high carbon build-up inside the engine, long-term. I want the fans to run when the a/c system is being used, even if the compressor is cycled-off at the time. Since there is a switch on the HVAC control for the a/c and there is a relay for the fans, it can't be difficult to do this. I just didn't want to spend the time trying to find the related wire diagram is someone has already done so.
I just can't figure why Subaru would design the system like this. Maybe they knew that 80 amps really isn't enough for a car with all the electrical equipment this thing has.