If you ever send some thing always think will it offend them.
if you see something that disturbs you don't panic tell your parent or guardian and they should be able to sort it out.
Don't join a party if you don't know who is in that party.
Select your local U A, press up on the control pad 2 access the menu and go 2 [Friends]. Either search for the PSN ID or select the user from your friends list that you want 2 block and press (X key).