Battery, starter and perhaps even AC compressor wearing out prematurely.
Also I think there is a safety issue with it... In the winter with people in the car a two minute stop at a light could cause the car's windows to steam up and to start freezing... How long after the engine starts will the defroster take to clear out the windows for an unobstructed view?
Same thing can happen in the summer when the AC cuts off and then at -20 or +30 how long before it gets uncomfortable in the car?
It is absolutely a total PITA in stop and go traffic too.
It is the first mod I would do to a car with this system in it... A permanent DELETE!