I'm perfectly willing to help hotels save the environment in exchange for 500 Starpoints. ^ Whenever hotels offer this, I accept it and happily reuse towels.

When hotels leave me a snotty note about how it's my responsibility to help them save costs, it makes me mad enough to...I don't know...throw a towel across the room and leave it on the floor...

Points, a $10 credit, a complimentary drink at the bar, whatever. I *want* to save the environment, as long as the hotel and I are in partnership doing it together. @:-)