PS VITA Help someone....do you know

 Hello Everyone... Anyone, anyone at all who has knowledge of PS Vita's, please tell an uneducated person what she needs to know. Can you get on Face book if the Internet is blocked? But WIFi can be accessed and a kid can talk to people out of state. HELP!!! I am at a loss. I don't want this kid getting into trouble or losing his VITA because of temptation. We all know about that. Also can a kid can into x rated site by accessing WIFI Is there a recently deleted app? Not just history? Thank you for any wisdom.