Yes, hotels definitely care if you take the bathrobe, and unlike the small bottles of shampoo or the disposable slippers, robes are not intended to be free amenities. Most hotels consider bathrobes to be part of the room's permanent "linen inventory," similar to towels and bed sheets. If a hotel discovers a robe is missing after you check out, they will almost certainly charge your credit card on file for the full retail replacement value of the item, which can range from $50 to over $150 at high-end resorts. Many luxury hotels now include a small tag in the closet explicitly stating the price of the robe should you wish to purchase one, or they offer new, packaged versions for sale in the gift shop. Some advanced hotels have even begun using RFID tracking chips embedded in the linens to monitor inventory and prevent theft. While taking a robe might seem like a small "souvenir" to a guest, it is a significant operational cost for the hotel; besides the financial charge, being caught stealing hotel property could potentially land you on a "do not stay" blacklist for that hotel chain.