Nowadays, "quiet cars" can be found on trains, in which people are forbidden to use their cell phones, computers, or talk loudly. What is your opinion about this policy?

I suppose it isn’t a good idea to set up quiet cars. There are two reasons. First, it is difficult for people on trains to keep quiet. A running train can make lots of noises itself. Also, sometimes staff on the train will walk pass the passage and ask people whether or not they will buy drinks. Second, it is also difficult to decide how many quiet cars will be set up on a train. Sometimes people will need to be quiet, but sometimes they would be more willing to chat with others. Thus makes this proposal hard to come true.