LOL! The first thing I always do is kick those things to the floor.
I once walked into a hotel room in southern Indiana somewhere off I-65 a few miles from the KY border. I was with 4 friends and we just needed a cheap place to crash. We walked in, and found brown stains on the sheets and cigarette burns all up and down the sides of the bath tub.
Needless to say, we walked right back out....we should have known better, it was $29.99 a night.
Bart