Why do all commercial aircraft have carpets? When flying I noticed that all the commercial aircraft I have been on use carpets as a floor covering. But why? If you fly in an older aircraft it looks worn out and it is susceptible to stains etc. Why do they not use one of the hard flooring options like linoleum?
helps prevent slips and falls
contains spills (your spilt soda won't ruin your neighbors bag) 
more easily removed and replaced
helps reduce cabin noise