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MAF's don't read airspeed. They calculate mass airflow by how much current it takes to keep the sense wire at a constant temp. If you speed up the airflow it will make the computer think there is more air than maybe actually is going through.
As far as O2 sensors countering a lean condition. They will tell the computer to enrich, but the fuel maps built into the computers will only go so far. The maps have short term and long term trim tables built in, but only go to a certain point. The setup I was talking about would be unlikely in affecting the system negatively. It definately would not be enough to harm the engine such as was alluded to earlier.
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