These three safety rules are important because you don't want someone you don't know to have your personal information readily available to hand out to others you don't know. If you don't block or ignore unwanted users then you will leave the door open for those people you don't know to get your information and share it with others you do not know. It is dangerous for kids to not know who they are talking to and even more dangerous when the parents don't know. Viruses can be sent from those people you do not block to your computer and they can get your personal information easily. Not knowing who you are talking to can be very dangerous and also put your family in a bad situation. Not knowing if you are talking to an adult or child is very difficult because it is easy to lie online. Bad people will show you pictures of kids to make you trust them.