Cable Ties Rock!
Not as drastic as the mohawk helmet on your home page, but I use 3 or 4 (depending on which helmet) 300mm cable ties on my helmet and I have not been hit by magpies since.
They will still swoop, but they don't actually hit my helmet or head - I sometimes see their shadow or hear a flutter, that's all :) ...
October 1st, 2013 By Alan C.