I actually have emailed to my sister and brother and attorney all my IB passwords and another broker's password. I also included instructions on how to get the money out.
Actually it is a legitimate service that has been widely discussed on the web and in academic circles. I believe it was started by a neuroscience professor out of Texas a few years ago. The concept was presented at a number of conferences over time.
I need them to handle a lot more volume for me. I have a long list of "Fuck You's" I need emailed upon my demise
Imagine, you could program this thing to "self destruct" your accounts, or take huge, all in risks after you kick the bucket..... the potential is endless.