I have used the Confidential Reporting System and believe in it 100%. I would be very happy to use it again. However, I have also sent an e-mail to the safety department which I (foolishly) believed would be confidential. A couple of days later I got hauled into the office (by Ed) because AAR had not liked the tone of my correspondence. It had not been addressed to him, or copied to anybody outside the safety department.
There are reporting systems in place but be very careful which one you use.