Bird Droppings... Your View

In response to Sean Brind's (City Island Phase II Project Manager) assertion that nothing can be done regarding the positioning of the cranes and therefore the target area for bird droppings, here are a few of your comments:

If they are in 'free slew' to face into the prevailing winds, why do niether of them ever point in the same direction?

If there are only light winds forecast, why can the cranes not be fixed in place? Surely they are not that flimsy that they will keel over in a light breeze?

Driving in to Leeds of an evening, I noticed that not one crane on the skyline seems to point into, or away from, the prevailing wind, it seems completely random -- is 'free slew' some kind of aeronautical randomness?

If they are left to face in to prevailing winds, why are they always facing the same way the next morning, as they were the previous night, no matter how windy it has been?