This is extremely stupid, but what do you do with clothes hangers from dry cleaning?

I just threw away a whole trash bag of it and feel very bad, but we collected soooo many throughout these years, while we use many of them in the closet, there are just a bunch that laid around in the closet which takes up so much space! I have told DH to take them back to the dry cleaners and see if they would reuse them, but they won't take them back.

What do you do with all those hangers?