Why do people routinely slam doors?

Some people routinely slam doors behind them, instead of using the door knob or handle to close the door. Here are some of the good answers/reasons I've collected from various forums:

1

I have had lots of kids with Attention Deficit Disorder, they all slam doors, often talk loud, etc. They are distracted, not present to a door. I am pretty sure Einstein did not only slam doors, he also left them open. As i have seen with my ADD kids lol 

2

It seems like as people started giving more attention to their handheld devices and computers, i.e smart phone phenomenon,

they started losing the ability to navigate conscious life gracefully/graciously.

3

I attribute it to selfishness and laziness & perhaps a bit ego based (making sure their presence is noted)

4

My autistic boy is the one who slams them but he can't operate the door handles so he slams them to make sure it shuts. He hates loud noises unless it's him that is making them, that is when he loves them.

5

My roommate slams the shower door, kitchen cupboards, bathroom door, refrigerator door and her room door. I think it is so inconsiderate and telling of how immature she is. I have asked her to stop, to no avail. I realize that her room door often gets stuck and requires a little pushing but she also does little stuff like slamming the toilet seat down. 

6

I think it's mostly lack of awareness. They are not conscious about the other people around them, nor the noise they are making.

7

Basically bad manners, lack of consideration for others, lack of mindfulness and maybe fear of the quiet

8

Because they just don't care about what's behind them. Not the door, not the room they leave, not what occupies the space they have left. They just don't care.

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Here are some advise to people who are dealing with these kind of person:

1

If it bothers you that much...install some foam or slow closing doors/cupboards. Talk to her again. Move out or ask her to move out.

2

I'd sit down and have a talk with your roommate. Just say that you're very noise-sensitive, and that the sound of slamming doors is very abrasive to you. Or something to that effect; put it in your own words. If your roommate likes you and is a considerate, respectful person, they'll try to abstain from slamming every door, and will be quieter.

3

Show them how to properly close the door just like this kid in the picture

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If you think above advises won't work, just ignore them. It is either they will stop if they realize that you are not affected by it or you will get use to it but don't do the same thing.