Because it is a non-problem and the alarmists will have no problem showing that these wind farms are just small "heat islands" that are dwarfed by even modest sized cities. Even if you are worried about Global Warming this is a gnat on an elephant kind of problem
Not if you live near the wind farms. And there are numerous other effects that slowing the wind will have on the atmospheric climate. Warming the area under the slowed winds is just the first observation. This study illustrates just how absolutely clueless the AGW crowd is.