I looked up why they want all this...what they can do with it, and here is the info I found. I hope it helps answer questions.
Do You Yahoo?
They cannot be monitored off the site. Scammers want to yahoo, because it’s web ba
All of your information is vital for different reasons. Every piece of personal information is important to someone and with only a bit of info they can do a whole lot of harm. It's like pieces of a puzzle.
If you get off site and go to yahoo, they get your ip address and can tell where you live.
Your name + phone # is worth money to phone sales people for mass mailings. Do not ever open email from people you do not know; and unless you are absolutely sure who it is from then treat them as spam. Opening spam alerts the sender that your address is a valid one and they send you loads and loads more of it to you.
Opening email could give them permission to track everything you type, including passwords.
Would you want the world to know those things you said in "private"? How about photos you exchanged?
Let's say I have your name and address. I know the county you live in. There are public records including marriages and tax rolls. Now I know your wife's maiden name and what you pay in taxes. Guess what the bank uses for a password on accounts? I call, represent myself as your son and I have your wife's maiden name etc. Just like any dam collapse starts with a small leak so does a stolen identity. It usually isn't one really stupid thing that costs you, it is a series of small things that someone is bright enough to connect and devious enough to exploit.
They contact the post office and submit a change of address form with your name and current address and changing it to their address so they receive all of your mail! That's right, bank statements, credit card statements, credit card applications, tax forms and everything else. Then they set up new credit cards in your name that you dont even know about and spend thousands of dollars! They call your bank and say the account has been compromised and ask for a new account number and new internet banking details so they can steal the money from your account.
* Don't trust anyone you don't know. It's just that simple.
* Don't believe the photo is real. Do an image check.
* Don't send out compromising photos or texts.
* Don't give your real name or other important details.
* Don't go to yahoo (gmail, etc.) if requested.
* Never give out your personal information to anyone, for any reason, whether by email, snail mail, phone call, or at your front door.
* Do not give or "loan" any online "friend" money...don't do it!!!
* When selling online, don't give anyone your information until you have confirmed details of the sale. Deal in cash and meet them at a public place like Starbucks to pick up the item so they never have a home address.
* If it seems to be too good to be true, it probably is.