Because you might have secret things and someone might hack it so thats why we have passwords in social network like facebook and twitter.
Because that person may not be who u think they r and might try and harm u or hack into ur accounts itz nasty
So that people who don't know you can't see your personal information.
information should you avoid posting on social networking sites?
Yes and no. It is much safer then other social networking sites, but you still have to be careful.
Information that should not be given over the internet includes any personal information. Anything that can lead people to you is not wise to put online. Plus with the rise of identity theft one must must be careful on the internet.
Do not post any specific personal information such as social security or driver's license numbers, birth dates and places, or any kind of information that you might enter when applying for a credit card or bank account.
Well, if your username doesn't have your real name then yes it is safe. You should also be very careful about your questions. Do not include who, or where. Personal information is a no no.
When logging into any system on a computer, you should be very careful not to leave your log in information where it can be accessed. Always make sure you close out any page with your personal information before leaving the computer.
You should always be careful with the information you provide online. Geico offers fast quotes with little hassle.
If you let someone know, they might use the information to put you in danger. For example, if someone who pretends to be your online friend and asks you where you live and you answer the truth, they might go to your house and rob you, kill you, etc.
You should NEVER share personal data over social networking sites! The ONLY way you should share data is in a Private Message (PM) - and ONLY if you know the other person well enough to TRUST them. Posting information such as phone, numbers, whatsapp, email, skype etc - on the main screen of a chatroom or social networking site - leaves you vulnerable to being targeted by anyone who cares to use that information for their own gain. Sharing such info in PM means only you and the person you're chatting to gets to see what's been sent.
Remove personal information such as your address and phone number from all public listings and shred paper trash with personal information