I was thinking if a Steem user (SU) nominated another steem user as a trusted steem friend (TSF). There could be at least one non malicious function that could be performed. Example . My son nominates me as the (TSF). While browsing his wallet I see a request for the movement of money out of steem to bitcoin. Because I am (TSF) there is a button which I can press which will halt any such transactions for 24 hours thus slowing down any potential hack. this would work if there is already a mandatory waiting period. worst case scenario he is delayed by 24 hours. best case scenario a hacker is stopped.