Used to do the same as you Raven, open the window and they'd scram for a few hours. Then....
This past Friday I came home from week long business trip to one of my feeders ripped down and practically chewed in half, a thistle bag with a chew hole in the bottom (the thistle? really?) and my suet bag with some chew holes in it.
I tried to be nice. Now I'm changing tactics and this from a friend:
We'll see how they feel about lead coming towards them at the speed of sound.