Slows things down. The bin is rarely ever 'full'. I sometimes travel with a 3' x 3" dia roll of architectural drawings - I love to stick those in with a bin full of rollaboards, because there won't be anything else going in there, and it uses otherwise unusable space. Really the bins should be closed by FAs, since they have a better handle on what will be needed, not some schmuck that travels once a year.