Yes, it depends how many turn up and how often - some people are fighting a constant battle with them and they can chew up all sorts of things.
We've never had more then three in the garden at the same time and usually it's just one. They don't eat very much and are soon gone - they nest in a huge tree outside the garden and spend a lot of time scampering about up there.
I suppose a few of my hanging feeders are squirrel resistant and I have got a metal squirrel feeder on the fence. I did have a wooden one and one squirrel chewed the lid trying to get at the peanuts inside