1. No in my opinion I do not think that you should call this invasion of privacy. Because if someone post something on the internet there obviously wanting to broadcast it to the world, but if it was texting or email, etc. Then yes, I would consider it invasion of privacy.

2. I would say yes, I have not read them, but I would say it says, anything you post is public infromation.

3. No, When you sign the terms and conditions it says they have the right to your information, so it belongs to the company and they can give it to whom they please, unless it wasn't in the terms and conditions then yes it would be violating your rights.