Facebook has not changed the definition of friend, it just
created another form of it. This new form of internet friend are just persons
that we never meet but have friends or interest in common .You can't really
"unfriend" a person you have known for an x amount of years, you
still need to have a real life confrontation.
Robin Dunbar says “In the sandpit of life, when somebody kicks sand in your face, you can’t get out of the sandpit. You have to deal with it, learn, compromise,” well in the "viral sandpit" it's easier to confront a person that kicks sand in your face. Facebook has enable introverted people that in real life never dare to express them self's to have a voice and make them self's be heard.
Something that I agree with is the privacy problem that Facebook creates, the information that Facebook has is pretty much a person's whole life now a days. The consequences is that people can get targeted by corporations and other people who seek to harm another Facebook user. It is true that people can restrict their profiles by only allowing friends to see their information and photos, but it's easy to accept another person as your friend even if you are not sure that you know him/her. Kids can easily have over 1000 friends that they don't know but accept just because, they may think "What's the harm in accepting another friend" well this new friend has access to all your information and photos.
The way that facebook allows organizations to have an account is beneficial for both facebook and the company. I personal have experience how Facebook can help a small business market itself and get in touch with customers. It's a simple way to create a homepage so customers can see the products and read information about prices and locations. A company can even get evaluated with a five star system which can be both good and bad.
Even clubs and bars are making a Facebook accounts, it's the perfect way to create an event and invite people to it. The event even marks its self in the calendar of the invited person and reminds the user that its getting close to that date.

Facebook is changing the world by uniting
people all over the world and its adapting itself so that users never get bored
or pushing people to create accounts by incorporating facebook in other products
like Spotify or Instagram which they actually bought.
Original article:
http://www.theguardian.com/technology/2015/aug/28/from-relationships-to-revolutions-seven-ways-facebook-has-changed-the-world
I liked what yo wrote about edited pictures that can get the attention of thousands.
SvaraRaderaIt is so much easier to comment on something that is happening very far away that you don't really know anything about tan actually take real life action against something that is happening where you are. People should think more before they publish crap on Facebook and other social media.
Comment on language: themselves and itself should be written as one word not two. This error appears a couple of times in the text.
In the last paragraph you're mentioning the connecting between other sites and Facebook and it's interresting that it get's more and more common. If you buy a pizza online you can click a button and tell your friends on Facebook, but what's the benefit from that really?
SvaraRaderaI feel that Facebook is changing from uniting people and hosting discussions, to a blog in a shattered format where people just want to post and not get responses. I might just be my Facebook-feed that's this way though.
/Erik Nilsson
Interesting thoughts, I think parents should teach their children about importance of privacy because as you said, companies or others users use this site to harm others which can be easily prevented by knowing to make your account private. Furthermore I do believe there should be an age limit to use facebook because as an adolescent you probably don't know better.
SvaraRadera