This seems like an overly complicated and noisy way to send a message. How is the intended recipient supposed to know they're the recipient? How can the sender be sure their message will be correctly interpreted.
I think if one of the power elite wanted to send a message to another of the power elite, they'd have their people pick up the phone, call the recipient's people, and give them the message.
Also, I'm pretty sure DeutscheBank has comprehensive, proven systems in place to handle threats like this lawsuit, without having to resort to weird-ass murder-suicide "messages".