Oh, my! That might be why they catch on fire. These windmills need to spin freely in high winds
As speeds increase, so do the effects of balance. The other issue is the design of the bearings to withstand those speeds in conjunction with the rotational imbalances. Everything magnified then and most likely would fall apart from the vibrational effects, not to mention any harmonics that would exponentially magnify all of the stresses.
Again, it costs more to attain, but if they are so hell bent on building more of these gawd awful things just simply add variable pitch blade mechanisms like aircraft use. Then they might be able to maximize the low airspeed conditions in addition to make them just sticks in the wind during high speeds by controlling the rotational speeds with pitch.