The airlines drop the ball in a lot of ways but this one's on the pax. In that article, for example, it's really on whoever threw up to take that bag off with them.

The other day we got on the plane and there was crap smeared on the lav wall. For ****'s sake. There's a very disappointing and disheartening lack of cleanliness and considerateness among many people. Many people fly. What're ya gonna do?