Argh, I'm sorry about what happened >_> I've had that happen before to several silk skirts; they'd take wide pins an use two on either side to secure my very heavy, layered silk skirt to the hanger

Luckily I'm not that anal about my clothing being pricked a bit, but if I had my scarves treated like that, I'd be upset. No doubt that they didn't mean to do it, but it still isn't fun to receive them back like that.
I can't think of a good way to avoid such item treatment then to give really, really explicit orders, but I don't even know if most dry cleaners would listen. I've had several shrug off my efforts to show them small stains that I'd like removed from my clothing, only to end up getting the item back with the same damn stain in place, and I end up having to remove it on my own. Bleh!
Edit: there is an article in an issue of Bazaar, I can't remember which one, that pertained to dry cleaning luxury goods...I'll try to find out which one when I get back from class!