Mobile phones: should they be banned in public places?

Many people have mixed feelings about the use of mobile phones in public places like restaurants and cinemas. (a) Whereas / However they were almost unknown twenty years ago, these days they are part of everyone's life, and the world would now feel a strange place without them.
One of the strongest arguments in favour of banning mobile phones is the annoyance they cause other people.(b) Although / Despite people are always asked to turn off their mobiles when they go to the cinema, you can be sure that the film you are watching will be interrupted by the sound of at least five ringing tones! (c) Therefore / What is more many people insist on continuing their conversation, (d) in spite of / even though hundreds of people can hear them! (e) For this reason / Besides many people would welcome a ban on mobile phones in places where they might irritate other people.
(f) On the other hand / Although there are a number of arguments against such a ban. It is really difficult to stop people bringing their mobile phones into public places, and (g) however / therefore it would be virtually impossible to enforce any ban. Some people would see this as an infringement of their rights, (h) even though / while other people would say they need them in case of an emergency. And (i) despite / besides being asked to turn their mobile phones off, some people insist on leaving them on, or simply forget to silence them. Perhaps the most important point is that, (j) although / in spite of all the disadvantages, many people these days simply feel that they can't live without their mobile.
It seems to me that a ban on mobile phones would be pointless. People will always find a way round any ban. (k) Nevertheless / Although, people should be discouraged from using them in places like restaurants, unless it is absolutely necessary. People should be made aware that it's very bad manners to use them at certain times. (l) However / Furthermore, there will always be someone who thinks their call is much more important than other people's peace and quiet!

Answers
Many people have mixed feelings about the use of mobile phones in public places like restaurants and cinemas. (a) Whereas they were almost unknown twenty years ago, these days they are part of everyone's life, and the world would now feel a strange place without them.
One of the strongest arguments in favour of banning mobile phones is the annoyance they cause other people.(b) Although people are always asked to turn off their mobiles when they go to the cinema, you can be sure that the film you are watching will be interrupted by the sound of at least five ringing tones! (c) What is more many people insist on continuing their conversation, (d) even though hundreds of people can hear them! (e) For this reason many people would welcome a ban on mobile phones in places where they might irritate other people.
(f) On the other hand there are a number of arguments against such a ban. It is really difficult to stop people bringing their mobile phones into public places, and (g) therefore it would be virtually impossible to enforce any ban. Some people would see this as an infringement of their rights, (h) while other people would say they need them in case of an emergency. And (i) despite being asked to turn their mobile phones off, some people insist on leaving them on, or simply forget to silence them. Perhaps the most important point is that, (j) in spite of all the disadvantages, many people these days simply feel that they can't live without their mobile.
It seems to me that a ban on mobile phones would be pointless. People will always find a way round any ban. (k) Nevertheless people should be discouraged from using them in places like restaurants, unless it is absolutely necessary. People should be made aware that it's very bad manners to use them at certain times. (l) However, there will always be someone who thinks their call is much more important than other people's peace and quiet!