No smoker should be allowed to enter into the cinema where a lot of people are watching the same movie. Simply because you like smoking doesn't mean another person is going to be interested in breathing in the smoke that you are bringing out from your stupid cigarettes.
It's never insane for a normal person to enter into a cinema and start smoking unless they are insane. Had it been they are more sane and normal, they will know that not every people don't like the smoke of cigarettes .
No one should be allowed to smoke in the cinema, not even the staff. This is because that is a very dangerous thing to do where people are in a group to watch a movie.
It's very bad that someone can enter a place where there's too much people and start to smoke. It's very wrong even though I haven't experienced it but the authorities should make sure such things don't happen.