I asked council if they'd trim the tree, since the tree is on public land.
Going past last night, I noticed that the tree had been well cut back, and the flag can now flutter freely in the breeze.
Next step - teach the Police about flag etiquette, and hauling it down after dark. They can no longer say, "It's stuck in the tree" as an excuse for leaving it up overnight. I have passed some information about flag etiquette to an associate in Police HQ - we'll see if it works it way down the chain of command to the front line here at Five Dock. When I see a bare flag pole out the front of the station after dark, I'll know that the message has made it through.