You jest, but the flat-earth lobby is already worrying over whether the huge wind farms operated by Denmark and the Netherlands are affecting Europe's climate.
yes I jest but my point is the wackos will not be happy with alternative energy. Their goal is to get us to stop using energy period.
In all seriousness wind is an important part of our weather. If you remove the energy from the system in significant (whats significant?) amounts it would probably have some impact. Not to mention all the dead birds.