I've never heard of them before. I've been on suicide watch/"observation" before, after this happened, and my friends and relatives were just informed to take me straight to the ER if they noticed any strange behaviour. I had to check in with a nurse at the hospital every week to ensure them I was feeling fine and such. It was a pain in the ass especially since I wasn't feeling that bad until I had to speak to these people... I wonder if they have these alert systems in Australia. As for Dakoda, no one really knew how depressed he was. It wasn't obvious.