I posted pics of our birdscares elsewhere, too. They are protecting the berries -- first strawberries, then raspberries, currants, and now blueberries. -- so far so good:
I have also heard that thin string or wire -- thinner than they can perch on, strung in random pattern above what is being protected is effective. As thin as mono filament fishing line. Doesn't have to be so close as to exclude them -- NOT netting, just obscure barricade that can snag their wings and damage them.
I have heard and seen this method is used above open air restaurants and food courtyards.