You mean aesthetically?

Aesthetically, I like it less when dozens of windmills are clearly in rows -- viewed from certain directions, that really obstructs view and makes for an 'industrial' appearance. Single or smaller groups of windmills placed haphazardly feel more natural. [My 'standards' for both are on the plains West of Vienna where I travel often.]

Non-aesthetically, to block single windmills would mean to block farmers and co-ops from starting projects of their own and limiting it to utilities/major investors only, and I would be very much against that. Renewable energy as distributed power has the extra qualities of 'democratising' electricity production, and boosting a rural economy depressed by the pressure on prices in agriculture.

_{*Lunatic*, n.
One whose delusions are out of fashion.}